var item_lightboxclick = function(e){
    var wh = this.get('rel').toString().split(':');
    var pw = 920;
    var left = (pw - wh[0]) / 2;
    var lb = new Element('div')
        .set('id','item_lightbox_container')
        .setStyles({'left': left.toString() + 'px','opacity':0});
    var lb_content = new Element('div').addClass('lb_content');
//        .setStyles({'width':wh[0].toString() + 'px','height':wh[1].toString() + 'px'});
    lb.grab(lb_content);
    $('contentWrap').grab(lb);
    var im = new Element('img')
        .addEvent('load',function(){
            lb.set('tween',{duration:10})
                .tween('opacity',[0,1]);
        })
        .set('src',this.get('href'));
    lb_content.grab(im);
    lb.grab(
        new Element('a')
            .set('href','#').addClass('lb_close').addEvent('click',function(e){
                lb.set('tween',{duration:10,onComplete:function(){lb.destroy()}}).tween('opacity',[1,0]);
                return false;
            })
        );
    return false;
}

window.addEvent('load',function(){
    var im = document.getElement('#itemlightbox');
    im.addEvent('click',item_lightboxclick);
});