var overlayDuration = 0.2;
var objBody;
var resizeSpeed = 7;
var resizeDuration = (11 - resizeSpeed) * 0.15;

 function lightboxmegj(kep)
 {
  
 objBody = document.getElementsByTagName("body").item(0);

  var objgyuriLightbox = document.createElement("div");
		objgyuriLightbox.setAttribute('id','gylightbox');
		
		objgyuriLightbox.onclick = function(e) {	// close Lightbox is user clicks shadow overlay
			objgyuriLightbox.parentNode.removeChild(objgyuriLightbox);
		};
  
  objBody.appendChild(objgyuriLightbox);
  
  //alert(objBody.getElementById("foframe").src);
  
  //objBody.location.replace("semmi.html");  
 
		objOverlay = document.createElement("div");
		objOverlay.setAttribute('id','overlay');
		objOverlay.style.display = 'none';
		
		objOverlay.style.height=document.body.clientHeight*1.4+"px";
		objOverlay.style.width="110%";
		
		objgyuriLightbox.appendChild(objOverlay);
 
 var objLoadingImage = document.createElement("img");
		objLoadingImage.setAttribute('src', kep);
		objLoadingImage.setAttribute('id','kepoverlay');
		objLoadingImage.style.display = 'none';
        objLoadingImage.style.position='absolute';
		
		objLoadingImage.style.left="300px"; //kép x-koordináta
		objLoadingImage.style.top="250px";  //kép y-koordináta
		
		objgyuriLightbox.appendChild(objLoadingImage);
 
        
 // stretch overlay to fill page and fade in
		var arrayPageSize = getPageSize();
		//setHeight(document.getElementById("overlay"), arrayPageSize[0]);

		
		
		
		
		
		//alert(overlayDuration);
		
		new Effect.Appear('overlay', { duration: overlayDuration, from: 0.0, to: 0.8 });
 
        new Effect.Appear('kepoverlay', { duration: 1.5, from: 0.0, to: 1.0 });
 
 
        //new Effect.Scale('kepoverlay', 50, {scaleX: false, duration: resizeDuration, queue: 'front'})
		
		//new Effect.Scale('kepoverlay', 50, {scaleY: false, delay: resizeDuration, duration: resizeDuration})
 
 }
 
 function setHeight(element,h) {
   		
    	element.style.height = h +"px";
	}
 
 
 function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		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
		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 = windowWidth;
	} else {
		pageWidth = xScroll;
	}

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

// -----------------------------------------------------------------------------------