var status=0;
  if (navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 3  ) is3 = true;
else
   {if (navigator.appName.substring(0,9)=="Microsoft"&&parseInt(navigator.appVersion)>=4)
    is3=true
   else is3 = false;}
  if (is3){
	but1= new Image(17,17); but1.src= "images/design/gen_print.gif";
	but1o=new Image(17,17); but1o.src="images/design/gen_printo.gif";
	but2= new Image(17,17); but2.src= "images/design/gen_top.gif";
	but2o=new Image(17,17); but2o.src="images/design/gen_topo.gif";       
		}
function hil(button,on){
 if (is3){
    if (on==1) text="o"; else text="";
    if (status!=button) document.images["button"+button].src = eval("but"+button+text+".src");
 }

}