//Popup Function
var newWin = null;
function popUp(strU,strW,strH){
x = (640 - strW)/2, y = (480 - strH)/2;
if(screen){ x = (screen.availWidth - strW)/2; y = (screen.availHeight - strH)/2; }
if(newWin != null && !newWin.closed){ newWin.close(); }
var newOpt = '';
newOpt = 'status,scrollbars=0,width='+strW+',height='+strH+',screenX='+x+',screenY='+y+',top='+y+',left='+x;
newWin = window.open(strU,'newWin',newOpt);
}