function banner_click(ev, url, target) {
	if(!ev) ev = window.event;

	if(target) {
		window.open(url, target);
	} else {
		document.location.href = url;
	}

	if(ev) {
		ev.returnValue = false;
		ev.cancelBubble = true;
		if(ev.preventDefault) ev.preventDefault();
	}
	return false;
}