text: function format(txt,compress/*是否为压缩模式*/){/* 格式化JSON源码(对象转换为JSON文本) */
    var indentChar = '    ';
    if(/^\s*$/.test(txt)){
      alert('数据为空,无法格式化! ');
      return;
    }
    try{var data=eval('('+txt+')');}
    catch(e){
      alert('数据源语法错误,格式化失败! 错误信息: '+e.description,'err');
      return;
    };
    var draw=[],last=false,This=this,line=compress?'':'\n',nodeCount=0,maxDepth=0;
  
    var notify=function(name,value,isLast,indent/*缩进*/,formObj){
      nodeCount++;/*节点计数*/
      for (var i=0,tab='';i<indent;i++ )tab+=indentChar;/* 缩进HTML */
      tab=compress?'':tab;/*压缩模式忽略缩进*/
      maxDepth=++indent;/*缩进递增并记录*/
      if(value&&value.constructor==Array){/*处理数组*/
        draw.push(tab+(formObj?('"'+name+'":'):'')+'['+line);/*缩进'[' 然后换行*/
        for (var i=0;i<value.length;i++)
          notify(i,value[i],i==value.length-1,indent,false);
        draw.push(tab+']'+(isLast?line:(','+line)));/*缩进']'换行,若非尾元素则添加逗号*/
      }else   if(value&&typeof value=='object'){/*处理对象*/
        draw.push(tab+(formObj?('"'+name+'":'):'')+'{'+line);/*缩进'{' 然后换行*/
        var len=0,i=0;
        for(var key in value)len++;
        for(var key in value)notify(key,value[key],++i==len,indent,true);
        draw.push(tab+'}'+(isLast?line:(','+line)));/*缩进'}'换行,若非尾元素则添加逗号*/
      }else{
        if(typeof value=='string')value='"'+value+'"';
        draw.push(tab+(formObj?('"'+name+'":'):'')+value+(isLast?'':',')+line);
      };
    };
    var isLast=true,indent=0;
    notify('',data,isLast,indent,false);
    return draw.join('');
  }