if (document.images) {
home = new Image();
home.src = "/technology/common/tabmenu/home.gif";
home_on = new Image();
home_on.src = "/technology/common/tabmenu/home_on.gif";

start = new Image();
start.src = "/technology/common/tabmenu/start.gif";
start_on = new Image();
start_on.src = "/technology/common/tabmenu/start_on.gif";

services = new Image();
services.src = "/technology/common/tabmenu/services.gif";
services_on = new Image();
services_on.src = "/technology/common/tabmenu/services_on.gif";

help = new Image();
help.src = "/technology/common/tabmenu/help.gif";
help_on = new Image();
help_on.src = "/technology/common/tabmenu/help_on.gif";

meetstaff = new Image();
meetstaff.src = "/technology/common/tabmenu/meetstaff.gif";
meetstaff_on = new Image();
meetstaff_on.src = "/technology/common/tabmenu/meetstaff_on.gif";
}

function switchOn(imgName) {
    if (document.images) {
      document[imgName].src = eval(imgName + "_on.src");
    }
}
  
function switchOff(imgName) {
    if (document.images) {
      document[imgName].src = eval(imgName + ".src");
    }
}