function spectrumSelect(prefix, div, value, item_count) {
		for(i = 0; i < item_count; i++) {
			document.getElementById(prefix+"-"+i).className = "item";
		}
		div.className = "selection";
		document.getElementById(prefix).value = value;
	}
	
	function checkSelect(prefix, img, value) {
		if(img.className == "on") {
			img.className = "off";
			img.src = "/images/check-off.png";
			document.getElementById(prefix).value = "";
		}
		else {
			img.className = "on";
			img.src = "/images/check-on.png";
			document.getElementById(prefix).value = value;
		}
	}