function currency_surfto(form) {
   var myindex=form.currency_selected.selectedIndex
   if (form.currency_selected.options[myindex].value != 0) {
   top.location=form.currency_selected.options[myindex].value;}
 }

 function open_window(url) {
   mywin = window.open(url,"win",'toolbar=0,location=0,directories=0,status=1,menubar=1,scrollbars=1,resizable=1,width=700,height=650');
 }