function popup(page)
{
	if(page=="how_it_works")
	{
		window.open("popup.php?page="+page, "","height=450,width=840,top=0,left=0,location=yes,menubar=yes,resizable=yes,scrollbars=yes,status=yes,titlebar=yes,toolbar=yes,directories=no");
	}
	else if(page=="privacy_and_terms")
	{
		window.open("popup.php?page="+page, "","height=720,width=840,top=0,left=0,location=yes,menubar=yes,resizable=yes,scrollbars=yes,status=yes,titlebar=yes,toolbar=yes,directories=no");
	}
}