function rollover(image) {
	if (image.src.indexOf("_active") > -1) return false;
	if (image.src.indexOf("_sel") == -1)
		image.src = image.src.substring( 0, image.src.indexOf(".gif") ) + "_sel.gif";
}

function rollout(image) {
	if (image.src.indexOf("_sel") > -1)
		image.src = image.src.substring( 0, image.src.indexOf("_sel") ) + ".gif";
}

function activateImage(image) {
	rollout(image);
	if (image.src.indexOf("_active") == -1)
		image.src = image.src.substring( 0, image.src.indexOf(".gif") ) + "_active.gif";
}

function deactivateImage(image) {
	rollout(image);
	if (image.src.indexOf("_active") > -1)
		image.src = image.src.substring( 0, image.src.indexOf("_active") ) + ".gif";
}

function parseQueryString(queryString) {
	var queryObject = new Object();
	queryString = queryString.replace(/^.*\?(.+)$/,'$1');
	while ((pair = queryString.match(/([^=]+)=\'?([^\&\']*)\'?\&?/)) && pair[0].length) {
		queryString = queryString.substring( pair[0].length );
		if (/^\-?\d+$/.test(pair[2])) pair[2] = parseInt(pair[2]);
		queryObject[pair[1]] = pair[2];
	}
	return queryObject;
}