jQuery给table中的负数标红色

<table class="tb_list"></table>

 $(function(){
          $(".tb_list td").each(function(i,n){
              var text = $.trim($(n).text());
              var fVal = parseFloat(text);
              if(!isNaN(fVal) && fVal < ){
                   $(n).css("color","red");
              }
      });
 });

2 当td里面有两个值时(示例中分隔符为<br>)，代码如下

  $(function () {
           $(".tb_list td").each(function (i, n) {
               //var txt = $.trim($(n).text());
               var txt = $(n).html();
               var arr = [];
               try{
                  arr = txt.split("<br>");
               }catch(e){}
               var innTxt = "";
               if(arr.length == ){
                   if (parseFloat(arr[]) <  || parseFloat(arr[]) < ) {
                       if (parseFloat(arr[]) < ) {
                           innTxt += "<font color='red'>" + arr[] + "</font>";
                       }
                       else innTxt += arr[];
                       if (parseFloat(arr[]) < ) {
                           innTxt += "<br><font color='red'>" + arr[] + "</font>";
                       }
                       else innTxt += "<br>" + arr[];
                       $(n).html(innTxt);
                   }
               }
           });
       });