var Ipop = Class.create();

Ipop.prototype = {
    imageArray: [],
    activeImage: undefined,
    
    // initialize()
    //
    initialize: function() {    

       $('overlay').hide().observe('click', (function() { this.end(); }).bind(this));
       $('ipop').hide().observe('click', (function(event) { if (event.element().id == 'ipop') this.end(); }).bind(this));

       var th = this;
      (function(){
            var ids = 'overlay ipop';   
            $w(ids).each(function(id){ th[id] = $(id); });
        }).defer();

    },

  doipop: function() {
  //   $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'hidden' });
  // stretch overlay to fill page and fade in
  var arrayPageSize = this.getPageSize();
  $('overlay').setStyle({ width: arrayPageSize[0] + 'px', height: arrayPageSize[1] + 'px' });

  // calculate top and left offset for the lightbox 
  var arrayPageScroll = document.viewport.getScrollOffsets();
  var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10);
  var lightboxLeft = arrayPageScroll[0];
  this.ipop.setStyle({ top: lightboxTop + 'px', left: lightboxLeft + 'px' }); //.show();  //als je m meteen zichtbaar wil

  new Effect.Appear(this.overlay, { duration: 0.5, from: 0.0, to: 0.8   });
  
  onComplete: new Effect.Appear(this.ipop, { duration: 1.0, from: 0.0, to: 1.0 })
  } ,

    //
    //  end()
    //
    end: function() {
        //this.disableKeyboardNav();
        this.ipop.hide();
        new Effect.Fade(this.overlay, { duration: 0.5 });
        //$$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'visible' });
    },

    //
    //  getPageSize()
    //
    getPageSize: function() {
	        
	     var xScroll, yScroll;
		
		if (window.innerHeight && window.scrollMaxY) {	
			xScroll = window.innerWidth + window.scrollMaxX;
			yScroll = window.innerHeight + window.scrollMaxY;
		} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
			xScroll = document.body.scrollWidth;
			yScroll = document.body.scrollHeight;
		} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
			xScroll = document.body.offsetWidth;
			yScroll = document.body.offsetHeight;
		}
		
		var windowWidth, windowHeight;
		
		if (self.innerHeight) {	// all except Explorer
			if(document.documentElement.clientWidth){
				windowWidth = document.documentElement.clientWidth; 
			} else {
				windowWidth = self.innerWidth;
			}
			windowHeight = self.innerHeight;
		} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
			windowWidth = document.documentElement.clientWidth;
			windowHeight = document.documentElement.clientHeight;
		} else if (document.body) { // other Explorers
			windowWidth = document.body.clientWidth;
			windowHeight = document.body.clientHeight;
		}	
		
		// for small pages with total height less then height of the viewport
		if(yScroll < windowHeight){
			pageHeight = windowHeight;
		} else { 
			pageHeight = yScroll;
		}
	
		// for small pages with total width less then width of the viewport
		if(xScroll < windowWidth){	
			pageWidth = xScroll;		
		} else {
			pageWidth = windowWidth;
		}

		return [pageWidth,pageHeight];
	}

}

function initIpop() { myIpop = new Ipop(); }
document.observe('dom:loaded', function () { initIpop(); });