function hightLight(type,obj,hightClassName,lowClassName)
{
   if(type==1)
   {
     document.getElementById(obj).setAttribute("class", hightClassName);
     document.getElementById(obj).setAttribute("className", hightClassName);    //for IE
   }
   else
   {
     document.getElementById(obj).setAttribute("class", lowClassName);
     document.getElementById(obj).setAttribute("className", lowClassName);    //for IE   
   }
}