javascript实现对html便签等字符的转义

<script>
 
var HtmlUtil = {
 
    /*1.用浏览器内部转换器实现html转码*/
 
    htmlEncode:function (html){
 
      //1.首先动态创建一个容器标签元素，如DIV
 
      var temp = document.createElement ("div");
 
      //2.然后将要转换的字符串设置为这个元素的innerText(ie支持)或者textContent(火狐，google支持)
 
      (temp.textContent != undefined ) ? (temp.textContent = html) : (temp.innerText = html);
 
      //3.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*/
 
    htmlDecode:function (text){
 
      //1.首先动态创建一个容器标签元素，如DIV
 
      var temp = document.createElement("div");
 
      //2.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;
 
      //3.最后返回这个元素的innerText(ie支持)或者textContent(火狐，google支持)，即得到经过HTML解码的字符串了。
 
      var output = temp.innerText || temp.textContent;
 
      temp = null;
 
      return output;
 
    },
 
    /*3.用正则表达式实现html转码*/
 
    htmlEncodeByRegExp:function (str){ 
 
       var s = "";
 
       if(str.length == 0) return "";
 
       s = str.replace(/&/g,"&");
 
       s = s.replace(/</g,"<");
 
       s = s.replace(/>/g,">");
 
       s = s.replace(/ /g," ");
 
       s = s.replace(/\‘/g,"‘");
 
       s = s.replace(/\"/g,""");
 
       return s; 
 
    },
 
    /*4.用正则表达式实现html解码*/
 
    htmlDecodeByRegExp:function (str){ 
 
       var s = "";
 
       if(str.length == 0) return "";
 
       s = str.replace(/&/g,"&");
 
       s = s.replace(/</g,"<");
 
       s = s.replace(/>/g,">");
 
       s = s.replace(/ /g," ");
 
       s = s.replace(/‘/g,"\‘");
 
       s = s.replace(/"/g,"\"");
 
       return s; 
 
    }
 
  };
 
</script>