//将字符串转换成html格式
    function toHtmlStr(str)
      {
		str=str.replace(/</ig,"&lt;");
		str=str.replace(/>/ig,"&gt;");
        str=str.replace(/\r\n|\n\r|\n|\r/g,"<br>");
        str=str.replace(/\"/ig,"&quot;");
        str=str.replace(/\ /ig,"&nbsp;");
        return str;
      }
	 //将字符串转换成textarea格式
    function toTextStr(str)
      {
		str=str.replace(/\\/ig,"\\\\");
        str=str.replace(/\r\n|\n\r|\n|\r/ig,"\\n");
        str=str.replace(/\"/ig,"\\\"");
		str=str.replace(/&quot;/ig,"\\\"");
		str=str.replace(/<br>/ig,"\\n");
		str=str.replace(/&lt;br&gt;/ig,"\\n");
        return str;
      }
	 function toTextStr1(str)
      {
        str=str.replace(/\r\n|\n\r|\n|\r/ig,"\n");
        str=str.replace(/\"/ig,"\\\"");
		str=str.replace(/quot;/ig,"\"");
		str=str.replace(/<br>/ig,"\n");
		str=str.replace(/&lt;br&gt;/ig,"\n");
        return str;
      }

	 function toUnHtmlStr(str)
      {
		str=str.replace(/&lt;/ig,"<");
		str=str.replace(/&gt;/ig,">");
		str=str.replace(/&nbsp;/ig," ");
        return str;
      }