var talkon = new Image; talkon.src="/images/nav/menu01_on.gif";
var surfon = new Image; surfon.src="/images/nav/menu02_on.gif";
var mobileon = new Image; mobileon.src="/images/nav/menu03_on.gif";
var abouton = new Image; abouton.src="/images/nav/menu04_on.gif";
var toucanon = new Image; toucanon.src="/images/nav/menu05_on.gif";