$(document).ready(function(){

    // Choose a random header image from the pre-determined selection
    // var header_images_array = new Array("header_chicken.jpg","header_colourful_shirt.jpg","header_tipi_tops.jpg");
    // var chosen_image = "images/" + header_images_array[Math.floor(Math.random() * (header_images_array.length))];
    // $("#header_image").attr("src",chosen_image);

	$(".menu_item").hover(
	function () {
        // Replace img src with rollover image.
    	var rollover_img = $(this).attr("src").replace(".jpg","_rollover.jpg");
	    $(this).attr("src",rollover_img);

		// Show associated links menu
    	var associate_div = "#" + this.id + "_div";
        if ( $(associate_div).is(":hidden") )
            $(".hidden_menu").hide();
			$(associate_div).fadeIn(350);
	},
	function () {
		// Put back the original image
		var original_img = $(this).attr("src").replace("_rollover.jpg",".jpg");
		$(this).attr("src",original_img);
	}
	);

});