function navon(imgName) { document[imgName].src = eval(imgName + "on.src"); }
function navover(imgName) { document[imgName].src = eval(imgName + "over.src"); }
function navoff(imgName) { document[imgName].src = eval(imgName + "off.src"); }

advantageon = new Image;
advantageon.src = "images/nav/advantage_on.gif";
advantageoff = new Image;
advantageoff.src = "images/nav/advantage_off.gif";
advantageover = new Image;
advantageover.src = "images/nav/advantage_over.gif";

capabilityon = new Image;
capabilityon.src = "images/nav/capability_on.gif";
capabilityoff = new Image;
capabilityoff.src = "images/nav/capability_off.gif";
capabilityover = new Image;
capabilityover.src = "images/nav/capability_over.gif";

techniqueon = new Image;
techniqueon.src = "images/nav/technique_on.gif";
techniqueoff = new Image;
techniqueoff.src = "images/nav/technique_off.gif";
techniqueover = new Image;
techniqueover.src = "images/nav/technique_over.gif";

experienceon = new Image;
experienceon.src = "images/nav/experience_on.gif";
experienceoff = new Image;
experienceoff.src = "images/nav/experience_off.gif";
experienceover = new Image;
experienceover.src = "images/nav/experience_over.gif";

teamon = new Image;
teamon.src = "images/nav/team_on.gif";
teamoff = new Image;
teamoff.src = "images/nav/team_off.gif";
teamover = new Image;
teamover.src = "images/nav/team_over.gif";

contacton = new Image;
contacton.src = "images/nav/contact_on.gif";
contactoff = new Image;
contactoff.src = "images/nav/contact_off.gif";
contactover = new Image;
contactover.src = "images/nav/contact_over.gif";