if (document.images) {

	link1on = new Image();           // Active images
	link1on.src = "images/web-link.jpg";
	link1off = new Image();          // Inactive images
	link1off.src = "images/web-link2.jpg";
	
	link2on = new Image();           // Active images
	link2on.src = "images/social-link.jpg";
	link2off = new Image();          // Inactive images
	link2off.src = "images/social-link2.jpg";	
	
	link3on = new Image();           // Active images
	link3on.src = "images/contact-link.jpg";
	link3off = new Image();          // Inactive images
	link3off.src = "images/contact-link2.jpg";	

  }
    function imgOn(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "off.src");
            }
    }
    function imgOff(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "on.src");        
            }
    }