function nav()
	{
	   //var w = document.myform.mylist.selectedIndex;
	   var w = document.getElementById('myform').mylist.selectedIndex;
	   //var url_add = document.myform.mylist.options[w].value;
	   var url_add = document.getElementById('myform').mylist.options[w].value;
	   window.location.href = url_add;
	}