$("#pop").hover(showMenu,hideMenu);
var onPic = "collection_on.gif";
var offPic = "collection.gif";

function showMenu()
{
    $("#collection img").attr("src","../static/images/menu/"+onPic);
    $(".submenu").css("display","block");
}

function hideMenu()
{
    $("#collection img").attr("src","../static/images/menu/"+offPic);
    $(".submenu").css("display","none");
}