页面控制比例条显示(通过两张图片达到的效果)

/**
*控制比例条以及比例显示
*/
function bilv(cell,data){
     var  total = $("#total").val();
     if(total==0){
        total=1;
        }
     var count = data["count"];
     var a = count/total;
     if(a>1){
       a=1;
      }
     var  pic = "<img width='"+148*a+"' height='10' src='../../../res/sites/images/red_precent.gif'><img width='"+148*(1-count/total)+"' height='10' src='../../../res/sites/images/qian_precent.gif'>";
     var  bil ="<a>"+Math.round(a*100)+"%</a>";
    
     cell.html(pic+bil);
}