function imgPop(imgurl) {
	var X =  (screen.width - 800) / 2;
	var Y = (screen.height - 480) / 2;
	pop = window.open('./popup.php?img='+imgurl, '', 'resizable=1,HEIGHT=480,WIDTH=800,TOP='+Y+',LEFT='+X);
	pop.moveTo(X, Y);
} 

function vtPop(vturi) {
	var X =  (screen.width - 800) / 2;
	var Y = (screen.height - 480) / 2;
	vtWin = window.open(vturi, 'vtwin', "width=790,height=560,left="+X+",top="+Y);
	vtWin.focus();
}