if (document.images) {
//
    img01on = new Image();
    img01on.src = "images/homeon.gif";
    img02on = new Image();
    img02on.src = "images/abouton.gif";
        img03on = new Image();
    img03on.src = "images/serviceson.gif";
	    img04on = new Image();
    img04on.src = "images/formson.gif";
	    img05on = new Image();
    img05on.src = "images/contacton.gif";
	    img06on = new Image();
    img06on.src = "images/parentingon.gif";
//
    
	img01off = new Image();
	img01off.src = "images/homeoff.gif";
                img02off = new Image();
                img02off.src = "images/aboutoff.gif";
                img03off = new Image();
    img03off.src = "images/servicesoff.gif";
	    img04off = new Image();
    img04off.src = "images/formsoff.gif";
	    img05off = new Image();
    img05off.src = "images/contactoff.gif";
	    img06off = new Image();
    img06off.src = "images/parentingoff.gif";
}

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

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