function loading(params){
	var div_loading=document.createElement("div");
		$(div_loading).setStyle({
			"position":"absolute",
			"zIndex":100,
			"top":params.top,
			"left":params.left,
			"width":params.width,
			"height":params.height
		});
	if(params.id){
		div_loading.setAttribute("id",params.id,0);
	}
	var img_loading=document.createElement("img");
		$(img_loading).setStyle({
			"width":params.width,
			"height":params.height
		});
		img_loading.setAttribute("src",params.src,0);
	div_loading.appendChild(img_loading); 
	$(params.div_id).insert({'top':div_loading});
}