How to create loading popup which stay 5 seconds

Can somebody help me how to create on function loading() ( I have<div id="l" onclick="loading"></div>) to show popup with loading gif for 5 seconds (like http://www.queness.com/resources/html/moda开发者_如何学JAVAl/jquery-modal-window.html Simple Modal Window

Try

window.setTimeout(function(){window.close()}, 5000);

You need to look into overlays: http://flowplayer.org/tools/overlay/index.html