function CenterWindow(textField,submitForm) {
leftPos = 0
topPos = 0
if (screen) {
leftPos = (screen.width / 2) - 87.5
topPos = (screen.height / 2) - 70
}
ElementWindow = window.open('calendar.php?form='+submitForm+'&field='+textField+'','','width=175,height=140,left='+leftPos+',top='+topPos+',menubar=no,toolbar=no,scrollbars=no,resizable=no,status=no')
}