function pop_up(page)
{
	var newWind = window.open(page,"","left=100,top=100,width=275,height=470,menubar=no,scrollbars=no,resizable=yes");
	if (newWind.opener == null) {
		newWind.opener = self
	}
}

function invoice(page)
{
	var newWind = window.open(page,"","left=200,top=100,width=650,height=600,menubar=no,scrollbars=no,resizable=no");
	if (newWind.opener == null) {
		newWind.opener = self
	}
}