CSS EXPRESSIONS IN LIGHTVIEW.CSS * html #lightview { /* IE6 */position: absolute;margin-top: expression( (-1 * this.offsetHeight / 2 + (document.documentElement ? document.documentElement.scrollTop : 0) + (Lightview.navbarHeight || 0)) + 'px'); margin-left: expression( -1 * this.offsetWidth / 2 + (document.documentElement ? document.documentElement.scrollLeft : 0) + 'px');}/* Always cover 100% of the screen in IE6 */ html #overlay {position: absolute;height: expression(((window.Enumerable && window.Enumerable.max) ? [document.body.scrollHeight, document.documentElement.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight].max() : document.documentElement.scrollHeight) + 'px' ); width: expression(((window.Enumerable && window.Enumerable.max) ? [document.body.scrollWidth, document.documentElement.scrollWidth, document.body.offsetWidth, document.documentElement.clientHeight].max() : document.documentElement.scrollWidth) + 'px' );}