var help1;
function popup(urlName, width, height) {
	if (width == null) {
		width = 350;
	}
	if (height == null) {
		height = 390;
	}
	if (help1 != null) {
		if (!help1.closed){
			help1.close();
                }  
		help1 = null;
		help1 = window.open(urlName, "", "width=" + width + ",height=" + height + ",scrollbars=no","");
		help1.focus();				
	} else {
		help1 = window.open(urlName, "", "width=" + width + ",height=" + height + ",scrollbars=no","");
		help1.focus();
	}
}