function popwin(filepg)
{
w = 780;
h = 567;
LeftPosition=(screen.width)?(screen.width-w)/2:100;
TopPosition=(screen.height)?(screen.height-h)/2:100;
settings='width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars=auto,location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=0';
//window.open(filepg, 'popupnav', 'width=780,height=567,resizable=0,scrollbars=auto');
window.open(filepg, 'popupnav', settings);
//alert(filepg)
//window.open(filepg, 'popupnav');
}