function dmenu(menu_class,menu_id) {
	var tn=document.getElementsByTagName("div");
	for (var i=0; i < tn.length; i++)
 	if (tn[i].className == menu_class)
  	tn[i].style.display="none";
	document.getElementById(menu_id).style.display="block";
    }

   var win;
   function openwindow(url){
	win=window.open(url,"mywin","width=800,height=600,toolbar=no,scrollbars=yes,resizable=yes");

    }