function popupwindow_default(id,width,height)
{
    href = '/Popup.aspx?id=' + id;
    if(width == 0 || width == null){width=800;}
    if(height == 0 || height == null){height=300;} 
    style = 'width=' + width + ',height=' + height + ',toolbar=no,directories=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes';
    popupWin=window.open(href,'contactus',style);
    popupWin.focus()
}