function PopWindow(url, w, h) {
	window.open(url,'_blank','width=' + w + ',height=' + h + ',toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes');
}
	function toggleDropdown(elementId){
		isUp=!Element.visible(elementId);
		var signpost=$(elementId).parentNode;
		if (isUp) {
			signpost.style.backgroundImage="url('/images/signpostdown.gif')";
			Effect.SlideDown(elementId, { duration: 0.5 });
		} else {
			signpost.style.backgroundImage="url('/images/signpostup.gif')";
			Effect.SlideUp(elementId, { duration: 0.5 });
		} 
	}