function changemedium( imgobject, imagename, album ) {
			
		document.getElementById( 'mediumimg' ).src = imgobject.src;
		document.getElementById( 'lightboxlink' ).href = '/img/portfolio/' + album + '/' + imagename + '_large.jpg';
	
	}

	function changeopacity( imageobject, opacity ) {
	
			var object = imageobject.style;
			object.opacity = ( opacity / 100 );
			object.MozOpacity = ( opacity / 100 );
			object.KhtmlOpacity = ( opacity / 100 );
			object.filter = "alpha(opacity=" + opacity + ")";
    
	}