var NewTopology=new function(){
	this.PreloadImage=function(isURL){
		var i=new Image();
		i.src=isURL;
	}
	this.ChangeImage=function(isURL,isDescription){
		var lrImage=document.getElementById('GalleryBigPicture');
		lrImage.src=isURL;
		var lrDescription=document.getElementById('GalleryBigPictureDescription');
		lrDescription.innerHTML=isDescription;
	}
	this.AddChangeImageEvent2Listener=function(isElementId,isURL,isDescription){
		var lrElement=document.getElementById(isElementId);
		CrossBrowser.addEventListener(lrElement,'click',function(irEvent){NewTopology.ChangeImage(isURL,isDescription)});
	}
}