var q
	function popupInfo(sURL, pType) {	
		
		// decide dimensions
		switch (pType) {
			case "planning":
				sHeight=486;
				sWidth=400;
				break;
			case "materials":
				sHeight=486;
				sWidth=366;
				break;
			case "safety":
				sHeight=486;
				sWidth=366;
				break;
			case "warranty":
				sHeight=486;
				sWidth=450;
				break;
		}
		if (q) { q.close(); }
		q = popup(sURL,pType,sHeight,sWidth);
	}