function toggleShow(id) {
	if(id) {
		var trigger = document.getElementById(id+'trigger');
		var contentBlock = document.getElementById(id);

		if(contentBlock.style.display == "block") {
			contentBlock.style.display = "none";
			trigger.style.backgroundImage = 'url(images/arrow-right.gif)';
		}
		else {
			contentBlock.style.display = "block";
			trigger.style.backgroundImage = 'url(images/arrow-down.gif)';
		}
	}
}