利用随机字符串代替变量等，混淆原代码，保护自己写的代码，不利于别人直接剽窃
<SCRIPT language=JavaScript>
<!--
/**//**//**//**
**
==============================================================
====================================
** 类名：CLASS_CONFUSION
** 功能：JS混淆
** 示例：
---------------------------------------------------------
------------------------------------------
var xx = new CLASS_CONFUSION(code);
document.getElementById("display").innerHTML =
xx.confusion();
---------------------------------------------------------
------------------------------------------
** 作者：ttyp
** 邮件：[email protected]
** 日期：2006-3-20
** 版本：0.12
**
==============================================================
====================================
**/
function CLASS_CONFUSION(code){
//哈希表类
function Hashtable(){
this._hash = new Object();
this.add = function(key,value){
if(typeof(key)!="undefined"){
if(this.contains(key)==false){
this._hash[key]=typeof
(value)=="undefined"?null:value;
return true;
} else {
return false;
}
} else {
return false;
}
}
this.remove = function(key){delete this._hash
[key];}
this.count = function(){var i=0;for(var k in
this._hash){i++;} return i;}
this.items = function(key){return this._hash
[key];}
this.contains = function(key){return typeof
(this._hash[key])!="undefined";}
this.clear = function(){for(var k in
this._hash){delete this._hash[k];}}
}
function VariableMap(parent){
this.table = new Hashtable();
this.level = parent?parent.level+1:0;
this.parent= parent;
this.add = function(key,value){this.table.add
(key,value)};
this.items = function(key){return this.table.items
(key)};
this.count = function(){return this.table.count()};
this.contains = function(key){return
this.table.contains(key);}
this.isParameter = false;
}
this._caseSensitive = true;
//字符串转换为哈希表
this.str2hashtable = function(key,cs){
var _key = key.split(/,/g);
var _hash = new Hashtable();
var _cs = true;
if(typeof(cs)=="undefined"||cs==null){
_cs = this._caseSensitive;
} else {
_cs = cs;
}
for(var i in _key){
if(_cs){
_hash.add(_key[i]);
} else {
_hash.add((_key[i]+"").toLowerCase());
}
}
return _hash;
}
//获得需要转换的代码
this._codetxt = code;
if(typeof(syntax)=="undefined"){
syntax = "";
}
this._deleteComment = false;
//是否大小写敏感
this._caseSensitive = true;
//得到关键字哈希表
this._keywords = this.str2hashtable
("switch,case,delete,default,typeof,for,in,function,void,this,
boolean,while,if,return,new,true,false,try,catch,throw,null,el
se,do,var");
this._function = this.str2hashtable("function");
this._var = "var";
this._beginBlock = "{";
this._endBlock = "}";
this._window = this.str2hashtable
("alert,escape,unescape,document,parseInt,parseFloat");
//得到内建对象哈希表
this._commonObjects = this.str2hashtable
("String,Number,Boolean,RegExp,Error,Math,Date,Object,Array,Gl
obal");
//得到分割字符
this._wordDelimiters= " ,.?!;:\\/<>(){}[]\"'\r\n\t=+-
|*%@#$^&";
//引用字符
this._quotation = this.str2hashtable("\",'");
//行注释字符
this._lineComment = "//";
//转义字符
this._escape = "\\";
//多行引用开始
this._commentOn = "/*";
//多行引用结束
this._commentOff = "*/";
this._execute = "eval";
//引用调用字符
this._call = ".";
this._varPause = "=";
this._varContinue = ",";
//变量个数
this._varNum = 0;
this.confusion = function() {
var codeArr = new Array();
var word_index = 0;
var htmlTxt = new Array();
//得到分割字符数组(分词)
for (var i = 0; i < this._codetxt.length; i++) {
if (this._wordDelimiters.indexOf
(this._codetxt.charAt(i)) == -1) { //找不到关键字
if (codeArr[word_index] == null || typeof
(codeArr[word_index]) == 'undefined') {
codeArr[word_index] = "";
}
codeArr[word_index] += this._codetxt.charAt
(i);
} else {
if (typeof(codeArr[word_index]) != 'undefined'
&& codeArr[word_index].length > 0)
word_index++;
codeArr[word_index++] = this._codetxt.charAt
(i);
}
}
var quote_opened = false; //引用标记
var slash_star_comment_opened = false; //多行注
释标记
var slash_slash_comment_opened = false; //单行注
释标记
var line_num = 1; //行号
var quote_char = ""; //引用
标记类型
var call_opened = false;
var call_string = "";
var var_opened = false;
var var_pause = false;
var function_opened = false;
var parameter_opened = false;
var var_map = new VariableMap
();
var cur_var_map = var_map;
var execute_opened = false;
//按分割字，分块显示
for (var i=0; i <=word_index; i++){
//单独处理指针引用
if(call_opened&&typeof(codeArr[i])!="undefined"){
if(call_string.length==0){
if(this.isVar(codeArr[i])){
call_string +=codeArr[i];
}else{
htmlTxt[htmlTxt.length] = "[\"" +
this.toHex(call_string) + "\"]";
if(codeArr[i]!=this._call){
htmlTxt[htmlTxt.length] = codeArr
[i];
call_opened = false;
}
call_string = "";
}
} else {
if(!this.isVar(codeArr[i])){
htmlTxt[htmlTxt.length] = "[\"" +
this.toHex(call_string) + "\"]";
if(codeArr[i]!=this._call){
htmlTxt[htmlTxt.length] = codeArr
[i];
call_opened = false;
}
call_string = "";
}else{
htmlTxt[htmlTxt.length] = "[\"" +
this.toHex(call_string) + "\"]";
}
}
continue;
}
//处理空行（由于转义带来）
if(typeof(codeArr[i])=="undefined"||codeArr
[i].length==0){
continue;
} else if(codeArr[i]==" "){
htmlTxt[htmlTxt.length] = " ";
} else if(codeArr[i]=="\n"){
//处理换行
} else if (codeArr[i] == "\r"){
slash_slash_comment_opened = false;
quote_opened = false;
var_opened = false;
htmlTxt[htmlTxt.length] = "\r\n";
line_num++;
//处理function里的参数标记
} else if (!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&this.isFunction
(codeArr[i])){
htmlTxt[htmlTxt.length] = codeArr[i];
function_opened = true;
} else if (!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&codeArr[i]=="("){
htmlTxt[htmlTxt.length] = codeArr[i];
if(function_opened == true){
function_opened =false;
var_opened = true;
cur_var_map = new VariableMap
(cur_var_map);
cur_var_map.isParameter = true;
}
} else if (!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&codeArr[i]==")"){
htmlTxt[htmlTxt.length] = codeArr[i];
//处理var a = new Class(),b=new Date();类似的
问题
if(cur_var_map.isParameter){
var_opened = false;
var_pause = false;
}
} else if (!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&codeArr[i]==";"){
htmlTxt[htmlTxt.length] = codeArr[i];
var_opened = false;
var_pause = false;
if(execute_opened){
execute_opened = false;
}
} else if (!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&codeArr[i]
==this._var){
htmlTxt[htmlTxt.length] = codeArr[i];
var_opened = true;
var_pause = false;
} else if(!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&codeArr[i]
==this._varPause){
htmlTxt[htmlTxt.length] = codeArr[i];
var_pause = true;
} else if(!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&codeArr[i]
==this._varContinue){
htmlTxt[htmlTxt.length] = codeArr[i];
var_pause = false;
} else if(!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&codeArr[i]
==this._beginBlock){
cur_var_map = new VariableMap(cur_var_map);
var_opened = false;
htmlTxt[htmlTxt.length] = codeArr[i];
} else if(!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&codeArr[i]
==this._endBlock){
cur_var_map = cur_var_map.parent;
if(cur_var_map.isParameter){
cur_var_map = cur_var_map.parent;
}
htmlTxt[htmlTxt.length] = codeArr[i];
//处理引用调用
} else if (!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&codeArr[i]
==this._call){
//判断引用(.)后面第一个是否为字母货_$
if(i<word_index-1){
if(this.isVar(codeArr[i+1])){
if(call_opened){
htmlTxt[htmlTxt.length] =
this.toHex(call_string);
}
call_opened = true;
}else{
htmlTxt[htmlTxt.length] = this._call;
}
}else{
htmlTxt[htmlTxt.length] = this._call;
}
//处理关键字
} else if (!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened && this.isKeyword
(codeArr[i])){
htmlTxt[htmlTxt.length] = codeArr[i];
//处理eval后的字符串
} else if (!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened && codeArr[i]
==this._execute){
htmlTxt[htmlTxt.length] = "window[\"" +
this.toHex(codeArr[i]) + "\"]";
execute_opened = true;
//window内置对象
} else if (!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened && this.isWindow
(codeArr[i])){
htmlTxt[htmlTxt.length] = "window[\"" +
this.toHex(codeArr[i]) + "\"]";
//处理普通对象
} else if (!slash_slash_comment_opened&&!
slash_star_comment_opened && !quote_opened &&
this.isCommonObject(codeArr[i])){
htmlTxt[htmlTxt.length] = "window[\"" +
this.toHex(codeArr[i]) + "\"]";
//处理双引号（引号前不能为转义字符）
} else if (!slash_star_comment_opened&&!
slash_slash_comment_opened&&this._quotation.contains(codeArr
[i])){
if (quote_opened){
//是相应的引号
if(quote_char==codeArr[i]){
htmlTxt[htmlTxt.length] = codeArr[i];
quote_opened = false;
quote_char = "";
} else {
htmlTxt[htmlTxt.length] = this.toHex
(codeArr[i]);
}
} else {
htmlTxt[htmlTxt.length] = codeArr[i];
quote_opened = true;
quote_char = codeArr[i];
}
//处理转义字符
} else if(codeArr[i] == this._escape){
htmlTxt[htmlTxt.length] = codeArr[i];
if(i<word_index-1){
if(codeArr[i+1].charCodeAt(0)
>=32&&codeArr[i+1].charCodeAt(0)<=127){
htmlTxt[htmlTxt.length] = codeArr
[i+1].substr(0,1);
htmlTxt[htmlTxt.length] = this.toHex
(codeArr[i+1].substr(1));
i=i+1;
}
}
//处理多行注释的开始
} else if (!slash_slash_comment_opened && !
slash_star_comment_opened&&!quote_opened&&this.isStartWith
(this._commentOn,codeArr,i)){
slash_star_comment_opened = true;
htmlTxt[htmlTxt.length] = this._commentOn;
i = i + this.getSkipLength(this._commentOn);
//处理单行注释
} else if (!slash_slash_comment_opened && !
slash_star_comment_opened&&!quote_opened&&this.isStartWith
(this._lineComment,codeArr,i)){
slash_slash_comment_opened = true;
if(!this._deleteComment){
htmlTxt[htmlTxt.length] =
this._lineComment;
}
i = i + this.getSkipLength(this._lineComment);
//处理忽略词
} else if (!slash_slash_comment_opened && !
slash_star_comment_opened&&!quote_opened&&this.isStartWith
(this._ignore,codeArr,i)){
slash_slash_comment_opened = true;
htmlTxt[htmlTxt.length] = this._ignore;
i = i + this.getSkipLength(this._ignore);
//处理多行注释结束
} else if (!quote_opened&&!
slash_slash_comment_opened&&this.isStartWith
(this._commentOff,codeArr,i)){
if (slash_star_comment_opened) {
slash_star_comment_opened = false;
if(!this._deleteComment){
htmlTxt[htmlTxt.length] =
this._commentOff;
}
i = i + this.getSkipLength
(this._commentOff);
}
} else {
//不是在字符串中
if(!quote_opened){
//如果不是在注释重
if(!slash_slash_comment_opened && !
slash_star_comment_opened){
//不是在定义变量时
if(!var_opened){
if(this.translateVar
(cur_var_map,codeArr[i])==""){
htmlTxt[htmlTxt.length] =
codeArr[i];
}else{
htmlTxt[htmlTxt.length] =
this.translateVar(cur_var_map,codeArr[i]);
}
}else{
//不是在暂停变量定义时
if(var_pause){
if(this.translateVar
(cur_var_map,codeArr[i])==""){
htmlTxt[htmlTxt.length] =
codeArr[i];
}else{
htmlTxt[htmlTxt.length] =
this.translateVar(cur_var_map,codeArr[i]);
}
}else{
//变量符合命名规则，并且（变量
前为空格或制表符或逗号如：var a;var a;var a,b;，还有如果是
函数参数,如：function(a,b,c)
if(this.isVar(codeArr[i])&&
(i>0&&codeArr[i-1]==" "||codeArr[i-1]=="\t"||codeArr[i-1]
==this._varContinue||cur_var_map.isParameter)){
var name =
this.getRandName();
cur_var_map.add(codeArr
[i],name);
htmlTxt[htmlTxt.length] =
this.translateVar(cur_var_map,codeArr[i]);
}else{
htmlTxt[htmlTxt.length] =
codeArr[i];
}
}
}
//注释中
}else{
if(!this._deleteComment){
htmlTxt[htmlTxt.length] = codeArr
[i];
}
}
}else{
if(execute_opened){
if(this.translateVar
(cur_var_map,codeArr[i])==""){
htmlTxt[htmlTxt.length] = codeArr
[i];
}else{
htmlTxt[htmlTxt.length] =
this.translateVar(cur_var_map,codeArr[i]);
}
}else{
htmlTxt[htmlTxt.length] = this.toHex
(codeArr[i]);
}
}
}
}
return htmlTxt.join("");
}
this.isStartWith = function(str,code,index){
if(typeof(str)!="undefined"&&str.length>0){
var cc = new Array();
for(var i=index;i<index+str.length;i++){
cc[cc.length] = code[i];
}
var c = cc.join("");
if(this._caseSensitive){
if(str.length>=code[index].length&&c.indexOf
(str)==0){
return true;
}
}else{
if(str.length>=code
[index].length&&c.toLowerCase().indexOf(str.toLowerCase())
==0){
return true;
}
}
return false;
} else {
return false;
}
}
this.isFunction = function(val){
return this._function.contains(this._caseSensitive?
val:val.toLowerCase());
}
this.isKeyword = function(val) {
return this._keywords.contains(this._caseSensitive?
val:val.toLowerCase());
}
this.isWindow = function(val) {
return this._window.contains(this._caseSensitive?
val:val.toLowerCase());
}
this.isCommonObject = function(val) {
return this._commonObjects.contains
(this._caseSensitive?val:val.toLowerCase());
}
this.getSkipLength = function(val){
var count = 0;
for(var i=0;i<val.length;i++){
if(this._wordDelimiters.indexOf(val.charAt(i))
>=0){
count++;
}
}
if(count>0){
count=count-1;
}
return count;
}
//字符串转换为16进制形式
this.toHex = function(val){
var str = new Array();
for(var i=0;i<val.length;i++){
var c = val.charCodeAt(i);
if(c>=0&&c<256){
str[str.length] = "\\x" + val.charCodeAt
(i).toString(16);
}else{
str[str.length] = "\\u" + val.charCodeAt
(i).toString(16);
}
}
return str.join("");
}
//获得变量随机名
this.getRandName = function(){
var style = parseInt(Math.random()*4);
var len = parseInt(Math.random()*9)+1;
var n = [];
this._varNum++;
var c =
"abcdefghijklmnopqrstuvwsyzABCDEFGHIJKLMNOPQRSTUVWXYZ_$";
for(var i=0;i<len;i++){
n[n.length] = c.charAt(parseInt(Math.random()
*54));
}
return n.join("")+this._varNum;
}
//是否符合变量命名字首规则
this.isVar = function(val){
return /^[a-zA-Z_\$].*$/.test(val);
}
//翻译变量，如果返回为空则不存在此变量
this.translateVar = function(node,key){
if(node.contains(key)){
return node.items(key);
}
var cn = node.parent;
while(cn!=null){
if(cn.contains(key)){
return cn.items(key);
}
cn = cn.parent;
}
return "";
}
}
function doConfusion(o){
var htmltxt = "";
if (o == null){
alert("domNode is null!");
return;
}
var _codetxt = "";
if(typeof(o)=="object"){
switch(o.tagName){
case "TEXTAREA":
case "INPUT":
_codetxt = o.value;
break;
case "DIV":
case "SPAN":
_codetxt = o.innerText;
break;
default:
_codetxt = o.innerHTML;
break;
}
}else{
_codetxt = o;
}
var _syn = new CLASS_CONFUSION(_codetxt);
htmltxt = _syn.confusion();
return htmltxt;
}
function go()
{
var code = document.getElementById("code").value;
var xx = new CLASS_CONFUSION(code);
var a = new Date();
document.getElementById("display").value = xx.confusion();
alert("共花：" + (new Date().getTime()-a.getTime()) +
"ms");
}
//-->
</SCRIPT>