function isNumberKey(evt)
{
 var charCode = (evt.which) ? evt.which : event.keyCode
 if (charCode > 31 && (charCode < 48 || charCode > 57))
    return false;

 return true;
}

function popUp(url, width, height) {
    day = new Date();
    id = day.getTime();
    eval("page" + id + " = window.open(url, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=" + width + ",height=" + height + "');");
}