function highlight( elementId, childElementsTagName ) {
		var element = document.getElementById( elementId );
		var childElements = element.getElementsByTagName( childElementsTagName );
		
		for( var i = 0; i < childElements.length; i++ ) {
			childElements[i].style.color = "white";
			}
		}
		
		function lowlight( elementId, childElementsTagName ) {
			var element = document.getElementById( elementId );
			var childElements = element.getElementsByTagName( childElementsTagName );
			
			for( var i = 0; i < childElements.length; i++ ) {
			childElements[i].style.color = "";
		}
	}