var isLoaded = false;
function ImgLoad()
{
Img1 = new Image(59, 12);
Img1.src="im/about.gif";
Img2 = new Image(113, 12);
Img2.src="im/contacts.gif";
Img3 = new Image(83, 12);
Img3.src="im/home.gif";
Img4 = new Image(94, 12);
Img4.src="im/office.gif";
Img5 = new Image(158, 12);
Img5.src="im/shop.gif";

ImgOver1 = new Image(59, 12);
ImgOver1.src="im/about-h.gif";
ImgOver2 = new Image(113, 12);
ImgOver2.src="im/contacts-h.gif";
ImgOver3 = new Image(83, 12);
ImgOver3.src="im/home-h.gif";
ImgOver4 = new Image(94, 12);
ImgOver4.src="im/office-h.gif";
ImgOver5 = new Image(158, 12);
ImgOver5.src="im/shop-h.gif";

isLoaded = true;
};

function ChangeImg(imagename,objectsrc,flag)
{
 if (flag)
  {
   document.images[imagename].src=eval("ImgClick"+flag+".src");
  }
 else
 {
 if (isLoaded==true) 
  {
	document.images[imagename].src=eval(objectsrc+".src"); 
  };
 };
};