function submenu(n,k)
{	//alert(k)
   //alert(document.images[k].src)
   var sm =document.getElementById(n).style;
   if (sm.display !== "none") 
     {
	 sm.display = "none";
	 
	 document.images[k].src = "pic/menu_close.gif";
	 }
   else 
     {
	 sm.display = ""; 
 	 document.images[k].src = "pic/menu_open.gif";
	 	 }
}
function over(mytr){
	mytr.style.backgroundColor='#cccccc';
}
function out(mytr){
	mytr.style.backgroundColor='';
}