/* Image preloads */

	function newImage(arg) {
		if (document.images) {
			rslt = new Image();
			rslt.src = arg;
			return rslt;
		}
	}

	function changeImages() {
		if (document.images && (preloadFlag == true)) {
			for (var i=0; i<changeImages.arguments.length; i+=2) {
				document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
			}
		}
	}

	var preloadFlag = false;
	function preloadImages(language) {
		if (document.images) {
			if (language=='es') {
				images_folder = '../images-es/';
			} else {
				images_folder = '../images/';
			}

			about_over = newImage(images_folder + "about-over.gif");
			volunteer_over = newImage(images_folder + "volunteer-over.gif");
			project_staff_over = newImage(images_folder + "project_staff-over.gif");
			programs_over = newImage(images_folder + "programs-over.gif");
			alumni_over = newImage(images_folder + "alumni-over.gif");
			community_over = newImage(images_folder + "community-over.gif");
			support_over = newImage(images_folder + "support-over.gif");
			training_over = newImage(images_folder + "training-over.gif");
			news_over = newImage(images_folder + "news-over.gif");
			store_over = newImage(images_folder + "store-over.gif");
			english_over = newImage(images_folder + "english-over.gif");
			espanol_over = newImage(images_folder + "espanol-over.gif");
			preloadFlag = true;
		}
	}


/* Class change */
	function classChange( id, newclass ) {
		element = document.getElementById(id);
		if(element) element.className = newclass;
	}

	// make element visible
	function classVisible( id ) {
		element = document.getElementById(id);
		if(element) element.className = 'visible' ;
	}
	
	// make element hidden
	function classHidden( id ) {
		element = document.getElementById(id);
		if(element) element.className = 'hidden' ;
	}