if (document.images) {
 
	menu1on = new Image(); menu1on.src="/images/home_txt.png";
	menu1off = new Image(); menu1off.src="/images/home_img.png";
	menu2on = new Image(); menu2on.src="/images/film_txt.png";
	menu2off = new Image(); menu2off.src="/images/film_img.png";
	menu3on = new Image(); menu3on.src="/images/photog_txt.png";
	menu3off = new Image(); menu3off.src="/images/photog_img.png";
	menu4on = new Image(); menu4on.src="/images/about_txt.png";
	menu4off = new Image(); menu4off.src="/images/about_img.png";
	menu5on = new Image(); menu5on.src="/images/contact_txt.png";
	menu5off = new Image(); menu5off.src="/images/contact_img.png";

}

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

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