/*1.用浏览器内部转换器实现html编码（转义）*/
htmlEncode : function (html){
//.首先动态创建一个容器标签元素，如DIV
var temp = document.createElement ("div");
//然后将要转换的字符串设置为这个元素的innerText或者textContent
(temp.textContent != undefined ) ? (temp.textContent = html) : (temp.innerText = html);
//最后返回这个元素的innerHTML，即得到经过HTML编码转换的字符串了
var output = temp.innerHTML;
temp = null;
return output;
},
/*2.用浏览器内部转换器实现html解码（反转义）*/
htmlDecode : function (text){
//首先动态创建一个容器标签元素，如DIV
var temp = document.createElement("div");
//.然后将要转换的字符串设置为这个元素的innerHTML(ie，火狐，google都支持)
temp.innerHTML = text;
//最后返回这个元素的innerText或者textContent，即得到经过HTML解码的字符串了。 var output = temp.innerText || temp.textContent;
temp =null;
return output;
},
注：这两种方法都是利用innerHTML会编译字符串来实现转义和反转义
/*3.用正则表达式实现html编码（转义）*/
htmlEncodeByRegExp : function (str){
var temp = " ";
if(str.length == 0)
return " ";
temp = str.replace(/&/g,"&");
temp = temp.replace(//g,">");
temp = temp.replace(/\s/g," ");
temp = temp.replace(/\'/g,"'");
temp = temp.replace(/\"/g,""");
return temp;
},
/*4.用正则表达式实现html解码（反转义）*/
htmlDecodeByRegExp:function (str){
var temp = "";
if (str.length == 0)
return " ";
temp = str.replace(/&/g,"&");
temp = temp.replace(/</g,"<");
temp = temp.replace(/>/g,">");
temp = temp.replace(/ /g," ");
temp = temp.replace(/'/g,"\'");
temp = temp.replace(/"/g,"\"");
return temp;
},
/*5.用正则表达式实现html编码（转义）（另一种写法）*/
html2Escape : function(sHtml) {
return sHtml.replace (/[<>&"]/g,function(c){return{'<':'<','>':'>','&':'&','"':'"'}[c];});
},
/*6.用正则表达式实现html解码（反转义）（另一种写法）*/
escape2Html : function (str) {
var arrEntities = {'lt':'<','gt':'>','nbsp':' ','amp':'&','quot':'"'};
return str.replace(/&(lt|gt|nbsp|amp|quot);/ig,function(all,t){return arrEntities[t];});
}
