/*
 * Adds a class to an element
 *
 * @param ele The element to modify
 * @param cls The class to add
 */
function addClassToElement (ele, cls) {
	
	ele.className += " " + cls;
}

/*
 * Sets an element to be inactive
 *
 * @param id The element ID
 */
function setInactive (id) {
	
	addClassToElement(document.getElementById(id), "inactive");
}