isNS4 = (document.layers) ? true : false;
     isIE4 = (document.all && !document.getElementById) ? true : false;
     isIE5 = (document.all && document.getElementById) ? true : false;
     isNS6 = (!document.all && document.getElementById) ? true : false;
  
function show(object,textdesc) {

     if (isNS4){
        objElement = document.layers[object];
     }else if (isIE4) {
        objElement = document.all[object];
     }else if (isIE5 || isNS6) {
        objElement = document.getElementById(object);
     }
     
    objElement.innerHTML = textdesc
    objElement.style.visibility = "visible";
    
}

function hide(object) {
     if (isNS4){
        objElement = document.layers[object];
     }else if (isIE4) {
        objElement = document.all[object];
     }else if (isIE5 || isNS6) {
        objElement = document.getElementById(object);
     }

    objElement.style.visibility = "hidden";
}

function activatelink(object,pic,link) {

     if (isNS4){
        objElement = document.layers[object];
     }else if (isIE4) {
        objElement = document.all[object];
     }else if (isIE5 || isNS6) {
        objElement = document.getElementById(object);
     }
     
    menudesc = "<a href='" + link + "'><img border='0' src='" + pic + "'></a>" 
    objElement.innerHTML = menudesc
    objElement.style.visibility = "visible";
    
}