function openpopup(pg, width, height) {	
if (width == undefined | height == undefined) {
	width = 800;
	height = 600;
}
x = (screen.width - width) / 2;
y = (screen.height - height) / 2;
newWindow = window.open(pg,"win","toolbars=no,maximize=no,resize=no,location=no,directories=no,scrollbars=yes");
newWindow.resizeTo(width,height);
newWindow.moveTo(x,y);
newWindow.focus();
return false;
}