#lightbox{
    position:fixed; /* keeps the lightbox window in the current viewport */
    top:0; 
    left:0; 
    width:100%; 
    height:100%; 
    /**background:url(overlay.png) repeat;*/
    background: rgba(0,0,0,.7); 
    text-align:center;
}

#lightboxcontenttrick
{
	display: inline-block;
	vertical-align: middle;
	height: 90%;
}

#lightboxcontent
{
	/** deactivate this - otherwise, text is not displayed!*/
	/**font-size: 0;
	text-align: center;*/
	width: 100%;  /* Container's dimensions */
	height: 90%;
}

#lightboxcontent img
{
	display: inline-block;
	vertical-align: middle;
	max-height: 100%;
	max-width: 100%;
}