function popUp(url,w,h) {
var winl = (screen.width - 600) / 2;
var wint = (screen.height - 500) / 2;
winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',resizable=no,scrollbars=yes,status=no,menubar=no,directories=no,toolbar=no'
myHelpWin = window.open(url, "popUp", winprops)
if (parseInt(navigator.appVersion) >= 4) { myHelpWin.window.focus(); }
}