var screen_height = screen.height - 100;
var screen_width = screen.width - 100;
function ShopWindow(mypage) 
{
window.open(mypage,'music_delivery_system','width='+screen_width+',height='+screen_height+',top=0,left=0,scrollbars=yes,location=no,directories=no,status=yes,menubar=no,toolbar=no,resizable=yes');
}