function loadimg(arg) 
         {
          if (document.images) 
		     {
              limg = new Image();
              limg.src = arg;
              return limg;
             }
         }

var preloaded = false;

function preload()
         {
          if (document.images)
			 {
 	      icon1_=loadimg("images/icon1_.gif");
 	      icon2_=loadimg("images/icon2_.gif");
 	      icon3_=loadimg("images/icon3_.gif");
 	      icon4_=loadimg("images/icon4_.gif");
 	      icon5_=loadimg("images/icon5_.gif");
 	      nav0=loadimg("images/nav0.gif");
 	      nav1=loadimg("images/nav1.gif");
 	      nav2=loadimg("images/nav2.gif");
 	      nav3=loadimg("images/nav3.gif");
 	      nav4=loadimg("images/nav4.gif");
 	      nav5=loadimg("images/nav5.gif");
              preloaded = true;
             }
	     }
		 
function hilite() 
         {
          if (document.images && (preloaded==true)) 
		     {
              for (var i=0; i<hilite.arguments.length; i+=2)
			      {
                   document[hilite.arguments[i]].src=hilite.arguments[i+1];
                  }
             }
         }