/*
 * Code for collapsable areas.
 */
function toggleCollapsableArea( id ) {  
	var element = document.getElementById( id );
	var VISIBLE = "block";
	var HIDDEN = "none";
	
	if( element.style.display == VISIBLE ) {
		element.style.display = HIDDEN;
	} else {
		element.style.display = VISIBLE;
	}
}