function changeimg(obj) {
	if (document.getElementById) {
		var num = obj.id;
		var n = num.substr(3,1);
		var pla = document.getElementById("placeholder").getElementsByTagName("img");
		var img = document.getElementById("imgpreload").getElementsByTagName("img");
		pla[0].src = img[n].src;
		obj.style.backgroundColor = "#eeeed6";
		return false;
	} else { 
		return false;
	}
}