imagesNames = new Array("company", "technologies", "systemseng", "investors", "news", "careers");
if (document.images) {
        for (i = 0; i < imagesNames.length; i++) {
                imageObj1 = imagesNames[i] + "1";
                temp = eval(imageObj1 + " = new Image()");
                temp.src = "images/" + imageObj1 + ".gif";
                imageObj2 = imagesNames[i] + "2";
                temp = eval(imageObj2 + " = new Image()");
                temp.src = "images/" + imageObj2 + ".gif";
        }
}
function img_on(imgName) {
        if (document.images) {
                eval("document."  +  imgName  +  ".src = "  + imgName + "2.src");
        } 
}
function img_off(imgName) {
        if (document.images) {
                eval("document."  +  imgName  +  ".src = "  +  imgName  +  "1.src");
        } 
}