function openInCenter(xUrl, xWidth, xHeight) {
		the_Top = (window.screen.availHeight - xHeight)/2;
		the_Left = (window.screen.availWidth - xWidth)/2;
            strProperties="top=" + the_Top + ", left=" + the_Left + ",height=" + xHeight + ",width="+ xWidth +"toolbar=no,scrollbars=no,resizable=no,location=no,menubar=no,directories=no";
            window.open(xUrl, "popup", strProperties);
        }