var selected=0
function color(num){
 var name="link"
 var el=""
 if (document.getElementById(name+selected)){
 name="link"+selected
 el=document.getElementById(name)
 if (el.className=="menulinked") el.className="menulink"
 }
 name="link"+num
 el=document.getElementById(name) 
 el.className="menulinked"
 selected=num
 }