if (document.images) {

imgDIMon = new Image();
imgDIMon.src = "images/nav_on_01.gif";
imgDIMoff = new Image();
imgDIMoff.src = "images/nav_off_01.gif";

imgCOMon = new Image();
imgCOMon.src = "images/nav_on_02.gif";
imgCOMoff = new Image();
imgCOMoff.src = "images/nav_off_02.gif";

imgRECon = new Image();
imgRECon.src = "images/nav_on_03.gif";
imgRECoff = new Image();
imgRECoff.src = "images/nav_off_03.gif";

imgCORon = new Image();
imgCORon.src = "images/nav_on_04.gif";
imgCORoff = new Image();
imgCORoff.src = "images/nav_off_04.gif";

imgARTon = new Image();
imgARTon.src = "images/nav_on_05.gif";
imgARToff = new Image();
imgARToff.src = "images/nav_off_05.gif";

imgFAMon = new Image();
imgFAMon.src = "images/nav_on_06.gif";
imgFAMoff = new Image();
imgFAMoff.src = "images/nav_off_06.gif";

imgSPEon = new Image();
imgSPEon.src = "images/nav_on_07.gif";
imgSPEoff = new Image();
imgSPEoff.src = "images/nav_off_07.gif";
}


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");
}
}