if (document.images) 
{
img1 = new Image();
img2 = new Image();
img3 = new Image();
img4 = new Image();
img5 = new Image();
img6 = new Image();
img1.src = "../images/background.gif";
img2.src = "../images/interface.gif";
img3.src = "../images/title_ybt.gif";
img4.src = "../images/title_contact.gif";
img5.src = "../images/title_gallery.gif";
img6.src = "../images/title_links.gif"
}