function pop_up(url)
{
 var version=navigator.appVersion.charAt(0);
 if(navigator.appName=='Netscape' && parseInt(version)==4)
 {
 window.open(url,"_blank");
 }
 else
 {
  var splashwin = window.open(url,"_blank","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=no,screenx=10,screeny=10,left=430,top=200");
 }
}