function roll(img_src,img_name)
   {
   document[img_name].src = img_src;
   }
   
if (document.images) 
{
   img1 = new Image();
   img2 = new Image();
   img3 = new Image();
   img4 = new Image();
   img5 = new Image();
   
	img1.src = "/fe/home-over.gif";
   img2.src = "/fe/tools-over.gif"
   img3.src = "/fe/articles-over.gif";
   img4.src = "/fe/analytics-over.gif"
   img5.src = "/fe/members-over.gif";
}