document.cookie="test"
var toalert=true
var results=document.cookie.split(";")
for (n=0;n<=results.length-1;n++){
if (results[n].substring(1,8)=='alerted'){
toalert=false
break
}
}
function popup(){
if (document.cookie!=''&&toalert){
newwin = window.open('pop_up_bookmark.html', 'Special', 'alwaysRaised=yes,screenX=200,screenY=200,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=270,height=220');
newwin.focus();
document.cookie="alerted=yes"
}
}
popup();