Проблема с mootools - Joomla 1.5: Настройка и оптимизация

/* SOBI2 Gallery Lightbox Styles */
/* --------------------------------------- */
#lightbox {
	position: absolute;
	left: 0;
	width: 100%;
	z-index: 100;
	text-align: center;
	line-height: 0;
}
#lightbox a img{ border: none; }
#outerImageContainer{
	position: relative;
	background-color: #fff;
	width: 250px;
	height: 250px;
	margin: 0 auto;
}
#imageContainer{
	padding: 10px;
}
#loading{
	position: absolute;
	top: 40%;
	left: 0%;
	height: 25%;
	width: 100%;
	text-align: center;
	line-height: 0;
}
#hoverNav{
	position: absolute;
	top: 0;
	left: 0;
	height: 100%;
	width: 100%;
	z-index: 10;
}
#imageContainer>#hoverNav{ left: 0;}
#hoverNav a{ outline: none;}
#prevLink, #nextLink{
	width: 49%;
	height: 100%;
	background: transparent url(../images/blank.gif) no-repeat; /* Trick IE into showing hover */
	display: block;
}
#prevLink { left: 0; float: left;}
#nextLink { right: 0; float: right;}
#imageDataContainer{
	font: 10px Verdana, Helvetica, sans-serif;
	background-color: #fff;
	margin: 0 auto;
	line-height: 1.4em;
	overflow: auto;
	width: 100%
}
#imageData{	padding:0 10px; color: #666; }
#imageData #imageDetails{ width: 70%; float: left; text-align: left; }
#imageData #caption{ font-weight: bold;	}
#imageData #numberDisplay{ display: block; clear: left; padding-bottom: 1.0em;	}
#imageData #bottomNavClose{ width: 66px; float: right;  padding-bottom: 0.7em;	}
#overlay{
	position: absolute;
	top: 0;
	left: 0;
	z-index: 90;
	width: 100%;
	height: 500px;
	background-color: #000;
}