[JavaScript]常用隐藏图层方法

 

 <script language="javascript" type="text/javascript">
    
        function yingChang(obj,div)
        ...{

            
         Span = document.all(div);

         if ( Span.style.display == "")
         ...{
             Span.style.display = "none" ;
             obj.background="Images/down.JPG";
         }
         else 
         ...{
             Span.style.display = "";
             obj.background="Images/up.JPG"
         }
        }

    </script>