$(document).ready	(
						function()
						{
							$("#navigation img").mouseover	(
																function(event)
																{
																	event.preventDefault();
																	var newSRC = $(this).attr("src");
																	newSRC=newSRC.replace('.png','_over.png');
																	$(this).attr("src", newSRC);
																}
															);
							$("#navigation img").mouseout	(
																function(event)
																{
																	event.preventDefault();
																	var newSRC = $(this).attr("src");
																	newSRC=newSRC.replace('_over.png','.png');
																	$(this).attr("src", newSRC);
																}
															);
						}
					);