if (document.images) {   
               homeon = new Image;
               homeon.src = "images/nav/home_on2.gif"; 
               abouton = new Image;
               abouton.src = "images/nav/about_on.gif";  
               teamon = new Image;
               teamon.src = "images/nav/team_on.gif";  
               corpparton = new Image;
               corpparton.src = "images/nav/corppart_on.gif";
               techon = new Image;
               techon.src = "images/nav/tech_on.gif";
               presson = new Image;
               presson.src = "images/nav/press_on.gif";  
               contacton = new Image;
               contacton.src = "images/nav/contact_on2.gif";
                              
               homeoff = new Image;
               homeoff.src = "images/nav/home_off2.gif"; 
               aboutoff = new Image;
               aboutoff.src = "images/nav/about_off.gif"; 
               teamoff = new Image;
               teamoff.src = "images/nav/team_off.gif";                               
               corppartoff = new Image;
               corppartoff.src = "images/nav/corppart_off.gif";
               techoff = new Image;
               techoff.src = "images/nav/tech_off.gif";
               pressoff = new Image;
               pressoff.src = "images/nav/press_off.gif";  
               contactoff = new Image;
               contactoff.src = "images/nav/contact_off2.gif";       

}

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