if (document.images) {

image1first = new Image();
image1first.src = "images/aboutus.gif";
image2first = new Image();
image2first.src = "images/divisions.gif";
image3first = new Image();
image3first.src = "images/training.gif";
image4first = new Image();
image4first.src = "images/joinus.gif";
image5first = new Image();
image5first.src = "images/2.jpg";
image6first = new Image();
image6first.src = "images/3.jpg";
image7first = new Image();
image7first.src = "images/4.jpg";
image8first = new Image();
image8first.src = "images/5.jpg";
image9first = new Image();
image9first.src = "images/login.gif";

image1second = new Image();
image1second.src = "images/aboutus2.gif";
image2second = new Image();
image2second.src = "images/divisions2.gif";
image3second = new Image();
image3second.src = "images/training2.gif";
image4second = new Image();
image4second.src = "images/joinus2.gif";
image9second = new Image();
image9second.src = "images/login2.gif";
}

function displaymenu (id,swap,imid)
{
var themenu = document.getElementById(id);
themenu.style.display=(themenu.style.display == 'block')?'none':'block';
swapimage(swap,imid);
}

function swapimage(newswap,newid)
{
document.getElementById(newid).src= (document.getElementById(newid).src==eval(newswap+"first.src"))?eval(newswap+"second.src"):eval(newswap+"first.src");
}