function galchange(img_name,caption_name,img_src,new_caption) {
	document.getElementById(img_name).src = img_src;
	document.getElementById(img_name).alt = new_caption;
	document.getElementById(caption_name).innerHTML = new_caption;
}

function toggledisplay($elementid) {
	if (document.getElementById($elementid).style.display == "" || document.getElementById($elementid).style.display == "none") {
		document.getElementById($elementid).style.display = "block";
	} else {
		document.getElementById($elementid).style.display = "";
	}
}