onError=null;

     if (document.images) { 
img1on = new Image();  
img1on.src = "http://www.gtoglobal.com/images/sm_about_on.gif";
img2on = new Image();
img2on.src = "http://www.gtoglobal.com/images/sm_loc_on.gif";
img3on = new Image();
img3on.src = "http://www.gtoglobal.com/images/sm_svcs_on.gif";
img4on = new Image();
img4on.src= "http://www.gtoglobal.com/images/sm_mission_on.gif";
img5on = new Image();
img5on.src = "http://www.gtoglobal.com/images/sm_lib_on.gif";
img6on = new Image();
img6on.src = "http://www.gtoglobal.com/images/sm_links_on.gif";
img7on = new Image();

img1off = new Image();  
img1off.src = "http://www.gtoglobal.com/images/sm_about_off.gif";
img2off = new Image();
img2off.src = "http://www.gtoglobal.com/images/sm_loc_off.gif";
img3off = new Image();
img3off.src = "http://www.gtoglobal.com/images/sm_svcs_off.gif";
img4off = new Image();
img4off.src= "http://www.gtoglobal.com/images/sm_mission_off.gif";
img5off = new Image();
img5off.src = "http://www.gtoglobal.com/images/sm_lib_off.gif";
img6off = new Image();
img6off.src = "http://www.gtoglobal.com/images/sm_links_off.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");
} }