function onImageA() {
SwitchMenu('sub3');
document.img.src='img/plus.gif'; }


if (document.getElementById){
document.write('<style type="text/css">\n')
document.write('.submenu{display: none; }\n')
document.write('</style>\n')
}


function SwitchMenu(obj){
    if(document.getElementById){
    var el = document.getElementById(obj);
    var ar = document.getElementById("masterdiv").getElementsByTagName("span");
        if(el.style.display != "block"){
            for (var i=0; i<ar.length; i++){
                if (ar[i].className=="submenu")
                ar[i].style.display = "none";
            }
            el.style.display = "block";
        }else{
            el.style.display = "none";
        }
    }
}