function contentWindow(URL) {

	var width;
	var height;
	var posX;
	var posY;

	width  = 800;
	height = 600;

	posX = Math.floor((screen.width - width) / 2);
	posY = 0;

	contentwindow = window.open(URL, 'contentwindow', 'height=' + height + ',width=' + width + ',resizable=1,menubar=0,toolbar=0,location=0,top=0,left=0,directories=0,scrollbars=0,status=0');
        contentwindow.focus();
	contentwindow.moveTo(posX, posY);

}