function test(x) {
    if (navigator.appName == 'Microsoft Internet Explorer')
    x.blur();
}

function show_layer(x) {
    if(document.layers) document.layers[x].visibility="show";
    else document.all[x].style.visibility="visible";
}

function hide_layer(x) {
    if(document.layers) document.layers[x].visibility="hide";
    else window.document.all[x].style.visibility="hidden";
}

var old;
var memold;

if(document.layers) {
    window.captureEvents(Event.MOUSEDOWN);
    window.onmousedown=do_out;
}
else {
    document.onmouseup=do_out;
}

function do_menu(x) {
    if(old!=x && old) {
        if(old!=0) hide_layer(old);
        if(x!=0) show_layer(x);
        old=x;
    }
    else if(old!=x) {
        if(x!=0) show_layer(x);
        old=x;
    }
}

function do_out() {
    if(old) hide_layer(old);
    memold=old; old="";
  }