var captionBox;
function startJS() {
	captionBox = document.getElementById( "art_caption" );
}

function showCaption( title, year, medium, dimensions, zoomIconId ) {
	captionBox.innerHTML = "<i>" + title + "</i>, " + year;
	captionBox.style.visibility = "visible";
	if( zoomIconId ) 
		document.getElementById( zoomIconId ).style.visibility = "visible";
}

function hideCaption( zoomIconId ) {
	captionBox.style.visibility = "hidden";
	if( zoomIconId ) 
		document.getElementById( zoomIconId ).style.visibility = "hidden";
}