if (document.images) {  
            img1on = new Image();      
            img1on.src = "images/button-parenting-on.gif"; 
            img2on = new Image(); 
            img2on.src = "images/button-care-edu-on.gif";  
            img3on = new Image();
            img3on.src = "images/button-recreation-social-on.gif";
            img4on = new Image();
            img4on.src = "images/button-basic-needs-on.gif";
            img5on = new Image();
            img5on.src = "images/button-financial-on.gif";
            img6on = new Image();
            img6on.src = "images/button-legal-on.gif";
            img7on = new Image();
            img7on.src = "images/button-health-care-on.gif";


            img1off = new Image(); 
            img1off.src = "images/button-parenting.gif"; 
            img2off = new Image();          
            img2off.src = "images/button-care-edu.gif"; 
            img3off = new Image();
            img3off.src = "images/button-recreation-social.gif";
            img4off = new Image();
            img4off.src = "images/button-basic-needs.gif";
            img5off = new Image();
            img5off.src = "images/button-financial.gif";
            img6off = new Image();
            img6off.src = "images/button-legal.gif";
            img7off = new Image();
            img7off.src = "images/button-health-care.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");
        }
}