陈德馨

eval(function(p,a,c,k,e,d) 加密JavaScript程序破解方法

900人参与 |分类: 站长百科|时间:2016年06月12日 13:10

最近几天没有更新博客,是因为在仿制一款名博的主题,但是按照正常的Z-blog主题扒皮流程是没有用的,因为主题原作者做了很多防止扒皮的措施,而且对很多JS脚本进行了加密,打开源代码全部是一堆eval(function(p,a,c,k,e,d) 开头的乱码,根本不知道程序里面调用了那些参数。所以必须对源码进行解密,采后才能针对性的调整。

针对eval(function(p,a,c,k,e,d)这种加密方法,网上有很多解密方法,经过我多次测试,发现网络上的方法有很多细节没有注意,导致并不能完整解密甚至根本就无法解密。所以今天陈德馨将根据一些教程的案例进行eval(function(p,a,c,k,e,d)解密方法详细无误的说一下。

案例源代码:

eval(function(p,a,c,k,e,d){e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)){while(c--){d[e(c)]=k[c]||e(c)}k=[function(e){return d[e]}];e=function(){return'\\w+'};c=1};while(c--){if(k[c]){p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c])}}return p}('b(G 4b.4v!=="8"){4b.4v=8(o){8 F(){};F.5x=o;f 3f F()}}3 y={36:8(){f 49.4q},1A:8(s){f 5M.36().2j().1t(s.2j())>-1}};y.5N=(y.36().2j().26(/[\\s\\S]+(?:5O|5G|5I|T)[\\/: ]([\\d.]+)/)||[])[1];y.28=y.1A("28");y.46=y.1A("46")&&!y.28;y.3b=y.1A("3b");y.T=y.1A("5u")&&!y.3b;y.5f=y.T&&m.5g&&G m.J.z.3M==="V";y.5h=y.T&&m.J&&G m.J.z.3M!=="V"&&G 4p==="V";y.59=y.T&&G 4p!=="V";3 3o=8(){3 1W=[];3 1v=8(){b(!1X.1E.4g){1X.1E.4g=L;w(3 i=0;i<1W.h;i++){1W[i]()}}};b(m.3i){m.3i("6f",1v,D)}b(y.T){(8(){3j{m.J.5Z("4w")}39(e){1c(1X.1E,50);f}1v()})();m.3n=8(){b(m.2e==="4B"){m.3n=A;1v()}}}b(y.28&&m.2e){(8(){b(m.2e!=="4W"){1v()}j{1c(1X.1E,10)}})()}1i.4C=1v;f 8(u){b(G u==="8"){1W[1W.h]=u}f u}}();3 B=8(){3 18={3r:/[^\\s{][^{]*\\{(?:[^{}]*\\{[^{}]*\\}[^{}]*|[^{}]*)*\\}/g,4m:/[^\\s{][^{]*\\{[^{}]*\\}/g,6g:/[a-4E-Z\\-]+[^;]*:[^;]+;/g,3y:/3x\\([\'"]?([^\\/\\)\'"][^:\\)\'"]+)[\'"]?\\)/g,4f:/(?:\\/\\*([^*\\\\\\\\]|\\*(?!\\/))+\\*\\/|@4D[^;]+;)/g,4e:/\\s*(,|:|;|\\{|\\})\\s*/g,4d:/\\s{2,}/g,4c:/;\\}/g,4j:/\\S+/g};3 17,2f=D;3 1R=[];3 2M=8(u){b(G u==="8"){1R[1R.h]=u}};3 3p=8(){w(3 i=0;i<1R.h;i++){1R[i](17)}};3 1a={};3 1I=8(n,v){b(1a[n]){3 2d=1a[n].1J;b(2d){w(3 i=0;i<2d.h;i++){2d[i](v)}}}};3 3v=8(42,4z,2F){b(y.T&&!1i.1P){1i.1P=8(){f 3f 4F("4G.4I")}}b(!1P){f""}3 r=3f 1P();3j{r.4H("4J",42,L);r.57("51","1P")}39(e){2F();f}3 2S=D;1c(8(){2S=L},4Z);m.J.z.4x="4Y";r.3n=8(){b(r.2e===4&&!2S){b(!r.1G&&4X.4K==="53:"||(r.1G>=56&&r.1G<55)||r.1G===4O||49.4q.1t("4P")>-1&&G r.1G==="V"){4z(r.4Q)}j{2F()}m.J.z.4x="";r=A}};r.4U("")};3 31=8(U){U=U.1S(18.4f,"");U=U.1S(18.4e,"$1");U=U.1S(18.4d," ");U=U.1S(18.4c,"}");f U};3 1s={3z:8(s){3 o={};3 X=s.1t("{");3 3h=s.C(0,X);s=s.C(X+1,s.h-1);3 1b=[],2c=[];3 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其实这个eval(function(p,a,c,k,e,d){}))中自带解码函数e(). while(c--){if(k[c]){p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c])}}return p while循环产生的每个p就是解码后的函数代码,我们删掉源码中的return p,不用将结果返回,而是直接输出在一个文本区域中,如document.getElementById(”textareaID”).innerText=p;

修改后的HTML代码:

<!DOCTYPE html P LIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> Crack</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<meta http-equiv="X- -Compatible" content="IE=EmulateIE7" />
<meta name="Author" content=www.chendexin.com/>
<meta name="Keywords" content="" />
<meta name="Description" content="" />  
 </head>
 <body>
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保存为html文件,运行,格式化文本区域中的JavaScript代码,代码如下:

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        function F() {};
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        return new F()
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}
var ua = {
    toString: function() {
        return navigator.userAgent
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    test: function(s) {
        return this.toString().toLowerCase().indexOf(s.toLowerCase()) > -1
    }
};
ua.version = (ua.toString().toLowerCase().match(/[\s\S]+(?:rv|it|ra|ie)[\/: ]([\d.]+)/) || [])[1];
ua.webkit = ua.test("webkit");
ua.gecko = ua.test("gecko") && !ua.webkit;
ua.opera = ua.test("opera");
ua.ie = ua.test("msie") && !ua.opera;
ua.ie6 = ua.ie && document.compatMode && typeof document.documentElement.style.maxHeight === "undefined";
ua.ie7 = ua.ie && document.documentElement && typeof document.documentElement.style.maxHeight !== "undefined" && typeof XDomainRequest === "undefined";
ua.ie8 = ua.ie && typeof XDomainRequest !== "undefined";
var domReady = function() {
    var _1 = [];
    var _2 = function() {
        if (!arguments.callee.done) {
            arguments.callee.done = true;
            for (var i = 0; i < _1.length; i++) {
                _1[i]()
            }
        }
    };
    if (document.addEventListener) {
        document.addEventListener("DOMContentLoaded", _2, false)
    }
    if (ua.ie) { (function() {
            try {
                document.documentElement.doScroll("left")
            } catch(e) {
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                return
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            _2()
        })();
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            if (document.readyState === "complete") {
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                _2()
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        }
    }
    if (ua.webkit && document.readyState) { (function() {
            if (document.readyState !== "loading") {
                _2()
            } else {
                setTimeout(arguments.callee, 10)
            }
        })()
    }
    window.onload = _2;
    return function(fn) {
        if (typeof fn === "function") {
            _1[_1.length] = fn
        }
        return fn
    }
} ();
var cssHelper = function() {
    var _3 = {
        BLOCKS: /[^\s{][^{]*\{(?:[^{}]*\{[^{}]*\}[^{}]*|[^{}]*)*\}/g,
        BLOCKS_INSIDE: /[^\s{][^{]*\{[^{}]*\}/g,
        DECLARATIONS: /[a-zA-Z\-]+[^;]*:[^;]+;/g,
        RELATIVE_URLS: /url\(['"]?([^\/\)'"][^:\)'"]+)['"]?\)/g,
        REDUNDANT_COMPONENTS: /(?:\/\*([^*\\\\]|\*(?!\/))+\*\/|@import[^;]+;)/g,
        REDUNDANT_WHITESPACE: /\s*(,|:|;|\{|\})\s*/g,
        MORE_WHITESPACE: /\s{2,}/g,
        FINAL_SEMICOLONS: /;\}/g,
        NOT_WHITESPACE: /\S+/g
    };
    var _4, _5 = false;
    var _6 = [];
    var _7 = function(fn) {
        if (typeof fn === "function") {
            _6[_6.length] = fn
        }
    };
    var _8 = function() {
        for (var i = 0; i < _6.length; i++) {
            _6[i](_4)
        }
    };
    var _9 = {};
    var _a = function(n, v) {
        if (_9[n]) {
            var _b = _9[n].listeners;
            if (_b) {
                for (var i = 0; i < _b.length; i++) {
                    _b[i](v)
                }
            }
        }
    };
    var _c = function(_d, _e, _f) {
        if (ua.ie && !window.XMLHttpRequest) {
            window.XMLHttpRequest = function() {
                return new ActiveXObject("Microsoft.XMLHTTP")
            }
        }
        if (!XMLHttpRequest) {
            return ""
        }
        var r = new XMLHttpRequest();
        try {
            r.open("get", _d, true);
            r.setRequestHeader("X_REQUESTED_WITH", "XMLHttpRequest")
        } catch(e) {
            _f();
            return
        }
        var _10 = false;
        setTimeout(function() {
            _10 = true
        },
        5000);
        document.documentElement.style.cursor = "progress";
        r.onreadystatechange = function() {
            if (r.readyState === 4 && !_10) {
                if (!r.status && location.protocol === "file:" || (r.status >= 200 && r.status < 300) || r.status === 304 || navigator.userAgent.indexOf("Safari") > -1 && typeof r.status === "undefined") {
                    _e(r.responseText)
                } else {
                    _f()
                }
                document.documentElement.style.cursor = "";
                r = null
            }
        };
        r.send("")
    };
    var _11 = function(_12) {
        _12 = _12.replace(_3.REDUNDANT_COMPONENTS, "");
        _12 = _12.replace(_3.REDUNDANT_WHITESPACE, "$1");
        _12 = _12.replace(_3.MORE_WHITESPACE, " ");
        _12 = _12.replace(_3.FINAL_SEMICOLONS, "}");
        return _12
    };
    var _13 = {
        mediaQueryList: function(s) {
            var o = {};
            var idx = s.indexOf("{");
            var lt = s.substring(0, idx);
            s = s.substring(idx + 1, s.length - 1);
            var mqs = [],
            rs = [];
            var qts = lt.toLowerCase().substring(7).split(",");
            for (var i = 0; i < qts.length; i++) {
                mqs[mqs.length] = _13.mediaQuery(qts[i], o)
            }
            var rts = s.match(_3.BLOCKS_INSIDE);
            if (rts !== null) {
                for (i = 0; i < rts.length; i++) {
                    rs[rs.length] = _13.rule(rts[i], o)
                }
            }
            o.getMediaQueries = function() {
                return mqs
            };
            o.getRules = function() {
                return rs
            };
            o.getListText = function() {
                return lt
            };
            o.getCssText = function() {
                return s
            };
            return o
        },
        mediaQuery: function(s, mql) {
            s = s || "";
            var not = false,
            _14;
            var exp = [];
            var _15 = true;
            var _16 = s.match(_3.NOT_WHITESPACE);
            for (var i = 0; i < _16.length; i++) {
                var _17 = _16[i];
                if (!_14 && (_17 === "not" || _17 === "only")) {
                    if (_17 === "not") {
                        not = true
                    }
                } else {
                    if (!_14) {
                        _14 = _17
                    } else {
                        if (_17.charAt(0) === "(") {
                            var _18 = _17.substring(1, _17.length - 1).split(":");
                            exp[exp.length] = {
                                mediaFeature: _18[0],
                                value: _18[1] || null
                            }
                        }
                    }
                }
            }
            return {
                getList: function() {
                    return mql || null
                },
                getValid: function() {
                    return _15
                },
                getNot: function() {
                    return not
                },
                getMediaType: function() {
                    return _14
                },
                getExpressions: function() {
                    return exp
                }
            }
        },
        rule: function(s, mql) {
            var o = {};
            var idx = s.indexOf("{");
            var st = s.substring(0, idx);
            var ss = st.split(",");
            var ds = [];
            var dts = s.substring(idx + 1, s.length - 1).split(";");
            for (var i = 0; i < dts.length; i++) {
                ds[ds.length] = _13.declaration(dts[i], o)
            }
            o.getMediaQueryList = function() {
                return mql || null
            };
            o.getSelectors = function() {
                return ss
            };
            o.getSelectorText = function() {
                return st
            };
            o.getDeclarations = function() {
                return ds
            };
            o.getPropertyValue = function(n) {
                for (var i = 0; i < ds.length; i++) {
                    if (ds[i].getProperty() === n) {
                        return ds[i].getValue()
                    }
                }
                return null
            };
            return o
        },
        declaration: function(s, r) {
            var idx = s.indexOf(":");
            var p = s.substring(0, idx);
            var v = s.substring(idx + 1);
            return {
                getRule: function() {
                    return r || null
                },
                getProperty: function() {
                    return p
                },
                getValue: function() {
                    return v
                }
            }
        }
    };
    var _19 = function(el) {
        if (typeof el.cssHelperText !== "string") {
            return
        }
        var o = {
            mediaQueryLists: [],
            rules: [],
            selectors: {},
            declarations: [],
            properties: {}
        };
        var _1a = o.mediaQueryLists;
        var ors = o.rules;
        var _1b = el.cssHelperText.match(_3.BLOCKS);
        if (_1b !== null) {
            for (var i = 0; i < _1b.length; i++) {
                if (_1b[i].substring(0, 7) === "@media ") {
                    _1a[_1a.length] = _13.mediaQueryList(_1b[i]);
                    ors = o.rules = ors.concat(_1a[_1a.length - 1].getRules())
                } else {
                    ors[ors.length] = _13.rule(_1b[i])
                }
            }
        }
        var oss = o.selectors;
        var _1c = function(r) {
            var ss = r.getSelectors();
            for (var i = 0; i < ss.length; i++) {
                var n = ss[i];
                if (!oss[n]) {
                    oss[n] = []
                }
                oss[n][oss[n].length] = r
            }
        };
        for (i = 0; i < ors.length; i++) {
            _1c(ors[i])
        }
        var ods = o.declarations;
        for (i = 0; i < ors.length; i++) {
            ods = o.declarations = ods.concat(ors[i].getDeclarations())
        }
        var ops = o.properties;
        for (i = 0; i < ods.length; i++) {
            var n = ods[i].getProperty();
            if (!ops[n]) {
                ops[n] = []
            }
            ops[n][ops[n].length] = ods[i]
        }
        el.cssHelperParsed = o;
        _4[_4.length] = el;
        return o
    };
    var _1d = function(el, s) {
        el.cssHelperText = _11(s || el.innerHTML);
        return _19(el)
    };
    var _1e = function() {
        _5 = true;
        _4 = [];
        var _1f = [];
        var _20 = function() {
            for (var i = 0; i < _1f.length; i++) {
                _19(_1f[i])
            }
            var _21 = document.getElementsByTagName("style");
            for (i = 0; i < _21.length; i++) {
                _1d(_21[i])
            }
            _5 = false;
            _8()
        };
        var _22 = document.getElementsByTagName("link");
        for (var i = 0; i < _22.length; i++) {
            var _23 = _22[i];
            if (_23.getAttribute("rel").indexOf("style") > -1 && _23.href && _23.href.length !== 0 && !_23.disabled) {
                _1f[_1f.length] = _23
            }
        }
        if (_1f.length > 0) {
            var c = 0;
            var _24 = function() {
                c++;
                if (c === _1f.length) {
                    _20()
                }
            };
            var _25 = function(_26) {
                var _27 = _26.href;
                _c(_27,
                function(_28) {
                    _28 = _11(_28).replace(_3.RELATIVE_URLS, "url(" + _27.substring(0, _27.lastIndexOf("/")) + "/$1)");
                    _26.cssHelperText = _28;
                    _24()
                },
                _24)
            };
            for (i = 0; i < _1f.length; i++) {
                _25(_1f[i])
            }
        } else {
            _20()
        }
    };
    var _29 = {
        mediaQueryLists: "array",
        rules: "array",
        selectors: "object",
        declarations: "array",
        properties: "object"
    };
    var _2a = {
        mediaQueryLists: null,
        rules: null,
        selectors: null,
        declarations: null,
        properties: null
    };
    var _2b = function(_2c, v) {
        if (_2a[_2c] !== null) {
            if (_29[_2c] === "array") {
                return (_2a[_2c] = _2a[_2c].concat(v))
            } else {
                var c = _2a[_2c];
                for (var n in v) {
                    if (v.hasOwnProperty(n)) {
                        if (!c[n]) {
                            c[n] = v[n]
                        } else {
                            c[n] = c[n].concat(v[n])
                        }
                    }
                }
                return c
            }
        }
    };
    var _2d = function(_2e) {
        _2a[_2e] = (_29[_2e] === "array") ? [] : {};
        for (var i = 0; i < _4.length; i++) {
            _2b(_2e, _4[i].cssHelperParsed[_2e])
        }
        return _2a[_2e]
    };
    domReady(function() {
        var els = document.body.getElementsByTagName("*");
        for (var i = 0; i < els.length; i++) {
            els[i].checkedByCssHelper = true
        }
        if (document.implementation.hasFeature("MutationEvents", "2.0") || window.MutationEvent) {
            document.body.addEventListener("DOMNodeInserted",
            function(e) {
                var el = e.target;
                if (el.nodeType === 1) {
                    _a("DOMElementInserted", el);
                    el.checkedByCssHelper = true
                }
            },
            false)
        } else {
            setInterval(function() {
                var els = document.body.getElementsByTagName("*");
                for (var i = 0; i < els.length; i++) {
                    if (!els[i].checkedByCssHelper) {
                        _a("DOMElementInserted", els[i]);
                        els[i].checkedByCssHelper = true
                    }
                }
            },
            1000)
        }
    });
    var _2f = function(d) {
        if (typeof window.innerWidth != "undefined") {
            return window["inner" + d]
        } else {
            if (typeof document.documentElement != "undefined" && typeof document.documentElement.clientWidth != "undefined" && document.documentElement.clientWidth != 0) {
                return document.documentElement["client" + d]
            }
        }
    };
    return {
        addStyle: function(s, _30) {
            var el = document.createElement("style");
            el.setAttribute("type", "text/css");
            document.getElementsByTagName("head")[0].appendChild(el);
            if (el.styleSheet) {
                el.styleSheet.cssText = s
            } else {
                el.appendChild(document.createTextNode(s))
            }
            el.addedWithCssHelper = true;
            if (typeof _30 === "undefined" || _30 === true) {
                cssHelper.parsed(function(_31) {
                    var o = _1d(el, s);
                    for (var n in o) {
                        if (o.hasOwnProperty(n)) {
                            _2b(n, o[n])
                        }
                    }
                    _a("newStyleParsed", el)
                })
            } else {
                el.parsingDisallowed = true
            }
            return el
        },
        removeStyle: function(el) {
            return el.parentNode.removeChild(el)
        },
        parsed: function(fn) {
            if (_5) {
                _7(fn)
            } else {
                if (typeof _4 !== "undefined") {
                    if (typeof fn === "function") {
                        fn(_4)
                    }
                } else {
                    _7(fn);
                    _1e()
                }
            }
        },
        mediaQueryLists: function(fn) {
            cssHelper.parsed(function(_32) {
                fn(_2a.mediaQueryLists || _2d("mediaQueryLists"))
            })
        },
        rules: function(fn) {
            cssHelper.parsed(function(_33) {
                fn(_2a.rules || _2d("rules"))
            })
        },
        selectors: function(fn) {
            cssHelper.parsed(function(_34) {
                fn(_2a.selectors || _2d("selectors"))
            })
        },
        declarations: function(fn) {
            cssHelper.parsed(function(_35) {
                fn(_2a.declarations || _2d("declarations"))
            })
        },
        properties: function(fn) {
            cssHelper.parsed(function(_36) {
                fn(_2a.properties || _2d("properties"))
            })
        },
        broadcast: _a,
        addListener: function(n, fn) {
            if (typeof fn === "function") {
                if (!_9[n]) {
                    _9[n] = {
                        listeners: []
                    }
                }
                _9[n].listeners[_9[n].listeners.length] = fn
            }
        },
        removeListener: function(n, fn) {
            if (typeof fn === "function" && _9[n]) {
                var ls = _9[n].listeners;
                for (var i = 0; i < ls.length; i++) {
                    if (ls[i] === fn) {
                        ls.splice(i, 1);
                        i -= 1
                    }
                }
            }
        },
        getViewportWidth: function() {
            return _2f("Width")
        },
        getViewportHeight: function() {
            return _2f("Height")
        }
    }
} ();
domReady(function enableCssMediaQueries() {
    var _37;
    var _38 = {
        LENGTH_UNIT: /[0-9]+(em|ex|px|in|cm|mm|pt|pc)$/,
        RESOLUTION_UNIT: /[0-9]+(dpi|dpcm)$/,
        ASPECT_RATIO: /^[0-9]+\/[0-9]+$/,
        ABSOLUTE_VALUE: /^[0-9]*(\.[0-9]+)*$/
    };
    var _39 = [];
    var _3a = function() {
        var id = "css3-mediaqueries-test";
        var el = document.createElement("div");
        el.id = id;
        var _3b = cssHelper.addStyle("@media all and (width) { #" + id + " { width: 1px !important; } }", false);
        document.body.appendChild(el);
        var ret = el.offsetWidth === 1;
        _3b.parentNode.removeChild(_3b);
        el.parentNode.removeChild(el);
        _3a = function() {
            return ret
        };
        return ret
    };
    var _3c = function() {
        _37 = document.createElement("div");
        _37.style.cssText = "position:absolute;top:-9999em;left:-9999em;" + "margin:0;border:none;padding:0;width:1em;font-size:1em;";
        document.body.appendChild(_37);
        if (_37.offsetWidth !== 16) {
            _37.style.fontSize = 16 / _37.offsetWidth + "em"
        }
        _37.style.width = ""
    };
    var _3d = function(_3e) {
        _37.style.width = _3e;
        var _3f = _37.offsetWidth;
        _37.style.width = "";
        return _3f
    };
    var _40 = function(_41, _42) {
        var l = _41.length;
        var min = (_41.substring(0, 4) === "min-");
        var max = (!min && _41.substring(0, 4) === "max-");
        if (_42 !== null) {
            var _43;
            var _44;
            if (_38.LENGTH_UNIT.exec(_42)) {
                _43 = "length";
                _44 = _3d(_42)
            } else {
                if (_38.RESOLUTION_UNIT.exec(_42)) {
                    _43 = "resolution";
                    _44 = parseInt(_42, 10);
                    var _45 = _42.substring((_44 + "").length)
                } else {
                    if (_38.ASPECT_RATIO.exec(_42)) {
                        _43 = "aspect-ratio";
                        _44 = _42.split("/")
                    } else {
                        if (_38.ABSOLUTE_VALUE) {
                            _43 = "absolute";
                            _44 = _42
                        } else {
                            _43 = "unknown"
                        }
                    }
                }
            }
        }
        var _46, _47;
        if ("device-width" === _41.substring(l - 12, l)) {
            _46 = screen.width;
            if (_42 !== null) {
                if (_43 === "length") {
                    return ((min && _46 >= _44) || (max && _46 < _44) || (!min && !max && _46 === _44))
                } else {
                    return false
                }
            } else {
                return _46 > 0
            }
        } else {
            if ("device-height" === _41.substring(l - 13, l)) {
                _47 = screen.height;
                if (_42 !== null) {
                    if (_43 === "length") {
                        return ((min && _47 >= _44) || (max && _47 < _44) || (!min && !max && _47 === _44))
                    } else {
                        return false
                    }
                } else {
                    return _47 > 0
                }
            } else {
                if ("width" === _41.substring(l - 5, l)) {
                    _46 = document.documentElement.clientWidth || document.body.clientWidth;
                    if (_42 !== null) {
                        if (_43 === "length") {
                            return ((min && _46 >= _44) || (max && _46 < _44) || (!min && !max && _46 === _44))
                        } else {
                            return false
                        }
                    } else {
                        return _46 > 0
                    }
                } else {
                    if ("height" === _41.substring(l - 6, l)) {
                        _47 = document.documentElement.clientHeight || document.body.clientHeight;
                        if (_42 !== null) {
                            if (_43 === "length") {
                                return ((min && _47 >= _44) || (max && _47 < _44) || (!min && !max && _47 === _44))
                            } else {
                                return false
                            }
                        } else {
                            return _47 > 0
                        }
                    } else {
                        if ("device-aspect-ratio" === _41.substring(l - 19, l)) {
                            return _43 === "aspect-ratio" && screen.width * _44[1] === screen.height * _44[0]
                        } else {
                            if ("color-index" === _41.substring(l - 11, l)) {
                                var _48 = Math.pow(2, screen.colorDepth);
                                if (_42 !== null) {
                                    if (_43 === "absolute") {
                                        return ((min && _48 >= _44) || (max && _48 < _44) || (!min && !max && _48 === _44))
                                    } else {
                                        return false
                                    }
                                } else {
                                    return _48 > 0
                                }
                            } else {
                                if ("color" === _41.substring(l - 5, l)) {
                                    var _49 = screen.colorDepth;
                                    if (_42 !== null) {
                                        if (_43 === "absolute") {
                                            return ((min && _49 >= _44) || (max && _49 < _44) || (!min && !max && _49 === _44))
                                        } else {
                                            return false
                                        }
                                    } else {
                                        return _49 > 0
                                    }
                                } else {
                                    if ("resolution" === _41.substring(l - 10, l)) {
                                        var res;
                                        if (_45 === "dpcm") {
                                            res = _3d("1cm")
                                        } else {
                                            res = _3d("1in")
                                        }
                                        if (_42 !== null) {
                                            if (_43 === "resolution") {
                                                return ((min && res >= _44) || (max && res < _44) || (!min && !max && res === _44))
                                            } else {
                                                return false
                                            }
                                        } else {
                                            return res > 0
                                        }
                                    } else {
                                        return false
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    };
    var _4a = function(mq) {
        var _4b = mq.getValid();
        var _4c = mq.getExpressions();
        var l = _4c.length;
        if (l > 0) {
            for (var i = 0; i < l && _4b; i++) {
                _4b = _40(_4c[i].mediaFeature, _4c[i].value)
            }
            var not = mq.getNot();
            return (_4b && !not || not && !_4b)
        }
    };
    var _4d = function(mql) {
        var mqs = mql.getMediaQueries();
        var t = {};
        for (var i = 0; i < mqs.length; i++) {
            if (_4a(mqs[i])) {
                t[mqs[i].getMediaType()] = true
            }
        }
        var s = [],
        c = 0;
        for (var n in t) {
            if (t.hasOwnProperty(n)) {
                if (c > 0) {
                    s[c++] = ","
                }
                s[c++] = n
            }
        }
        if (s.length > 0) {
            _39[_39.length] = cssHelper.addStyle("@media " + s.join("") + "{" + mql.getCssText() + "}", false)
        }
    };
    var _4e = function(_4f) {
        for (var i = 0; i < _4f.length; i++) {
            _4d(_4f[i])
        }
        if (ua.ie) {
            document.documentElement.style.display = "block";
            setTimeout(function() {
                document.documentElement.style.display = ""
            },
            0);
            setTimeout(function() {
                cssHelper.broadcast("cssMediaQueriesTested")
            },
            100)
        } else {
            cssHelper.broadcast("cssMediaQueriesTested")
        }
    };
    var _50 = function() {
        for (var i = 0; i < _39.length; i++) {
            cssHelper.removeStyle(_39[i])
        }
        _39 = [];
        cssHelper.mediaQueryLists(_4e)
    };
    var _51 = 0;
    var _52 = function() {
        var _53 = cssHelper.getViewportWidth();
        var _54 = cssHelper.getViewportHeight();
        if (ua.ie) {
            var el = document.createElement("div");
            el.style.position = "absolute";
            el.style.top = "-9999em";
            el.style.overflow = "scroll";
            document.body.appendChild(el);
            _51 = el.offsetWidth - el.clientWidth;
            document.body.removeChild(el)
        }
        var _55;
        var _56 = function() {
            var vpw = cssHelper.getViewportWidth();
            var vph = cssHelper.getViewportHeight();
            if (Math.abs(vpw - _53) > _51 || Math.abs(vph - _54) > _51) {
                _53 = vpw;
                _54 = vph;
                clearTimeout(_55);
                _55 = setTimeout(function() {
                    if (!_3a()) {
                        _50()
                    } else {
                        cssHelper.broadcast("cssMediaQueriesTested")
                    }
                },
                500)
            }
        };
        window.onresize = function() {
            var x = window.onresize ||
            function() {};
            return function() {
                x();
                _56()
            }
        } ()
    };
    var _57 = document.documentElement;
    _57.style.marginLeft = "-32767px";
    setTimeout(function() {
        _57.style.marginTop = ""
    },
    20000);
    return function() {
        if (!_3a()) {
            cssHelper.addListener("newStyleParsed",
            function(el) {
                _4e(el.cssHelperParsed.mediaQueryLists)
            });
            cssHelper.addListener("cssMediaQueriesTested",
            function() {
                if (ua.ie) {
                    _57.style.width = "1px"
                }
                setTimeout(function() {
                    _57.style.width = "";
                    _57.style.marginLeft = ""
                },
                0);
                cssHelper.removeListener("cssMediaQueriesTested", arguments.callee)
            });
            _3c();
            _50()
        } else {
            _57.style.marginLeft = ""
        }
        _52()
    }
} ());
try {
    document.execCommand("BackgroundImageCache", false, true)
} catch(e) {}

需要特别说明的是输出后是一堆代码. 需要把Javascript代码格式化一下。

格式化的网页工具:http://tool.chinaz.com/Tools/JsFormat.aspx 

来源:陈德馨博客(微信/QQ号:35435164),转载请保留出处和链接!

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