轻松解码类似eval(function(p,a,c,k,e,d){}))的JavaScript代码
这里解码百度访问统计代码构造函数为示例:
百度访问统计代码JavaScript源码:
红色加粗部分将是要修改的地方.
eval(function(p,a,c,k,e,d){e=function(c){return(c
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.
最终代码:
保存为html文件,运行.
格式化文本区域中的JavaScript代码,代码如下:
function Chart(E, D, A, C, B) {
this.parent = document.getElementById(E);
this.xl = D;
this.yl = A;
this.barw = (document.all) ? C: (C - 2);
this.chartw = 0;
this.charth = B + ((document.all) ? 0 : -2);
this.minpv = this.yl[0];
this.maxpv = this.yl[this.yl.length - 1]
}
Chart.prototype.GetPVHeight = function(B) {
var A = Math.round(((B - this.minpv) * this.charth / (this.maxpv - this.minpv))) + ((document.all) ? 2 : 0);
if (A > this.charth) {
A = this.charth
}
return A
};
Chart.prototype.Create = function() {
var A = document.createElement("div");
A.className = "chart";
A.style.height = this.charth + "px";
this.parent.appendChild(A);
var K = document.createElement("div");
A.appendChild(K);
K.className = "hit";
var J = 0;
for (var G = 0; G < this.xl.length; G += 2) {
var B = this.GetPVHeight(this.xl[G]);
var I = this.xl[G + 1];
var F = document.createElement("div");
A.appendChild(F);
F.className = "bar";
F.style.width = this.barw + "px";
F.style.height = B + "px";
F.style.top = this.charth - B - 1 + "px";
F.style.left = (J - 1) + "px";
F.innerHTML = " ";
F.ohit = K;
F.onmouseover = function() {
this.className = "barhl";
this.ohit.style.display = "";
this.ohit.innerHTML = this.id.substring(3, this.id.length);
this.ohit.style.left = this.style.left;
this.ohit.style.top = parseInt(this.style.top) - parseInt(this.ohit.offsetHeight) + "px"
};
F.onmouseout = function() {
this.className = "bar";
this.ohit.style.display = "none"
};
var E = document.createElement("div");
A.appendChild(E);
E.style.width = this.barw + "px";
E.style.top = (document.all) ? this.charth: this.charth + 3 + "px";
var C = I.indexOf(".");
F.id = "bar" + I.substring(0, C) + "\u6708" + I.substring(C + 1, I.length) + "\u65e5 " + this.xl[G];
if (G % 4 == 0) {
if ((I.substring(C + 1, I.length) == "1" || I.substring(C + 1, I.length) == "2")) {
E.className = "titxhl";
E.style.left = (J - 4) + "px";
E.innerHTML = I
} else {
E.className = "titx";
E.style.left = (J - 1) + "px";
E.innerHTML = I.substring(C + 1, I.length)
}
} else {
E.className = "titx";
E.style.left = (J - 1) + "px";
E.innerHTML = ""
}
J += this.barw + ((document.all) ? -1 : 1)
}
this.chartw = J + ((document.all) ? 1 : -1);
A.style.width = this.chartw + "px";
for (var G = 0; G < this.yl.length; G++) {
var D = this.GetPVHeight(this.yl[G]);
if (G != 0 && G != this.yl.length - 1) {
var H = document.createElement("div");
A.appendChild(H);
H.className = "liney";
H.style.width = (this.chartw - ((document.all) ? 1 : -1)) + "px";
H.style.top = (this.charth - D - 1) + "px"
}
var E = document.createElement("div");
A.appendChild(E);
E.className = "tity";
E.style.width = "35px";
E.style.top = (this.charth - D - 2) + "px";
E.style.left = -42 + "px";
E.innerHTML = this.yl[G]
}
};
修正以后发现一个更简单的方法..将eval直接替换成document.write,将代码输出,但是要注意一点.在输出前,先输出一个
输出后是一堆代码.
把Javascript格式化一下
格式化的网页工具
http://tool.chinaz.com/Tools/JsFormat.aspx