function album()
{
	var imgs = document.getElementById("kleine_fotos").getElementsByTagName("img");
	for (var i=0; i<imgs.length; i++)
	{
		imgs[i].onmouseover=function()
		{
			if(this.className == "center")
				this.className = "center hover";
			else
				this.className = "hover";
		}
		imgs[i].onmouseout=function()
		{
			if(this.className == "center hover")
				this.className = "center";
			else
				this.className = "";
		}
		
		imgs[i].onclick=function()
		{
			var src = this.src
			src = src.replace("klein_", "groot_");
			document.getElementById("img_grote_foto").src = src;
		}
	}
}