if (document.images) {            // Active Images
img1on = new Image();      
img1on.src = "img/AboutUs_On.gif";

img2on = new Image();      
img2on.src = "img/NewsResBtn_On.gif";

img3on = new Image();      
img3on.src = "img/contactus_On.gif";

img4on = new Image();      
img4on.src = "img/login_On.gif";

img5on = new Image();      
img5on.src = "img/Line1_On.gif";

img6on = new Image();
img6on.src = "img/Line2_On.gif";

img7on = new Image();
img7on.src = "img/Line3_On.gif";

img1off = new Image(); 
img1off.src = "img/AboutUs_Off.gif";  

img2off = new Image(); 
img2off.src = "img/NewsResBtn_Off.gif";

img3off = new Image(); 
img3off.src = "img/contactus_Off.gif";

img4off = new Image();      
img4off.src = "img/login_Off.gif";

img5off = new Image();      
img5off.src = "img/Line1_Off.gif";

img6off = new Image();
img6off.src = "img/Line2_Off.gif";

img7off = new Image();
img7off.src = "img/Line3_Off.gif";
}

// Function to 'activate' images.
function imgOn(imgName) {
if (document.images) {
 document[imgName].src = eval(imgName + "on.src");
}
}

// Function to 'deactivate' images.
function imgOff(imgName) {
if (document.images) {
 document[imgName].src = eval(imgName + "off.src");
}
}