var image_popup={
  init:function(){
    $$('a.popup_img_link').each(function(l){
      $(l).observe('click', function(event){
        Event.stop(event);
        if(!image_popup.overlay){
          image_popup.buildPopup();
        }
        if(!l.init){
          l.img=new Image()
          l.img.src=l.href;
          l.init=true;
        }
        $(image_popup.imgCont.overlay).setStyle({
          background:'transparent url('+this.img.src+') center no-repeat'
        });
        image_popup.overlay.show();
      }.bindAsEventListener(l));
    });
  },
  buildPopup:function(){
    var overlay=new nUtils.overlay({
      createInDomEl:$('wrapper'),
      opacity:0.8,
      style:{
        height:'445px',
      	width:'617px',
      	position:'absolute',
      	top:'156px',
      	left:'182px',
      	zIndex:2,
      	display:'none',
      	backgroundColor:'#ffffff'
      }
    });
    var imgCont=new nUtils.overlay({
      createInDomEl:$('wrapper'),
      opacity:1,
      style:{
        height:'445px',
      	width:'617px',
      	position:'absolute',
      	top:'156px',
      	left:'182px',
      	display:'none',
      	background:'none'
      },
      closeBtn:false
    });
    overlay.appendLayer(imgCont); 
    $(imgCont.overlay).observe('click', function(){
      overlay.hide();
    });      
    image_popup.overlay=overlay;
    image_popup.imgCont=imgCont;
    
  }
}