function popup(url,name,width,height,scrollbars) {
	var newWindow;
	newWindow = window.open(url,name,'scrollbars=' + scrollbars + ',height=' + height + ',width=' + width + ',top=' + (screen.height - height) / 2 + ',left=' + (screen.width-width) / 2 + ',resizable=yes');
	newWindow.focus();
}