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,width=530,height=520");

 }

}