var popupWindow;
function displayPopupWindow(URL) {
	width = screen.width * 0.7;
	height = screen.height * 0.7;
	window_spec = "width=" + width + ", height=" + height + ", left=0, top=0, resizable=yes, scrollbars=yes";
	popupWindow = window.open(URL, "PopupWindow", window_spec);
	popupWindow.focus();
}