function popPage(page){
	var wp = 480, hp = 340;
	if (document.all || document.layers) {
		wp = screen.availWidth;
		hp = screen.availHeight;
	}
	var leftPos = (wp-720)/2, topPos = (hp-410)/2;
	window.open('pop_'+page+'.html','popPage',eval("'width=720,height=410,left=" + leftPos + ",top=" + topPos + ",scrollbars=yes,resizable=yes,status=no,titlebar=no'"));
}