var popupWindow=null;
function popup(mypage,myname,w,h,pos,infocus){
if(pos=='random'){
LeftPosition=(screen.width)?Math.floor(Math.random()*(screen.width-w)):0;
TopPosition=(screen.height)?Math.floor(Math.random()*((screen.height-h)-0)):0;}
if(pos=='center'){
LeftPosition=(screen.width)?(screen.width-w)/2:0;
TopPosition=(screen.height)?(screen.height-h)/2:0;}
else if((pos!='center' && pos!='random') || pos==null){LeftPosition=0;TopPosition=0;} settings='width='+ w + ',height='+ h + ',top=' + TopPosition + ',left=' + LeftPosition + ',location=no,directories=no,menubar=no,toolbar=no,status=no,scrollbars=no,resizable=yes,dependent=yes';
popupWindow=window.open('',myname,settings);
//popup = window.open(filename,''height=400,width=400,top=0,left=0,location=no,menubar=no,resizable=yes,scrollbars=no,status=no,titlebar=no,toolbar=no,directories=no")
if(infocus=='front'){
popupWindow.focus();
//popupWindow.document.write('Performance');
//popupWindow.document.write('
');
popupWindow.location=mypage;
//popupWindow.document.write('');
}
}