function replace(obj, img1, img2){
	var img_elem = new Array();
	img_elem = (obj.src).split("/");
	var active_img = img_elem[img_elem.length - 1];
		
	var image1 = img1 + ".jpg";
	var image2 = img2 + ".jpg";
	
	if (active_img == image1) {
		obj.src = "images/" + image2;
	} else {
		obj.src = "images/" + image1;
	}
	
}

function resize_image(handler) {
	
	if (handler.width >= 500) {
		handler.width = 500 * 0.25;	
	} else {
		handler.width = 500;
	}
	
}

function blink(handler) {
	handler.style.border = '1px dotted red';
}

function reblink(handler) {
	handler.style.border = '';
}