var currentMenu = null;
        var mytimer = null;
        var timerOn = false;
        var opera = window.opera ? true : false;

        if (!document.getElementById)
                document.getElementById = function() { return null; }

        function initialiseMenu(menuId, starterId) {
                var menu = document.getElementById(menuId);
                var starter = document.getElementById(starterId);

                if (menu == null || starter == null) return;
                        currentMenu = menu;

                starter.onmouseover = function() {
                        if (currentMenu) {
                                currentMenu.style.visibility = "hidden";
                                currentMenu = null;
                                this.showMenu();
                                stopTime();
                        }
                }

                menu.onmouseover = function() {
                        if (currentMenu) {
                                currentMenu.style.visibility = "hidden";
                                currentMenu = null;
                                this.showMenu();
                        }
                }

                starter.showMenu = function() {
                        if (!opera) {
                                menu.style.left = this.offsetLeft + "px";
                                menu.style.top = this.offsetTop + this.offsetHeight + "px";
                        }
                        else {
                                menu.style.left = this.offsetLeft + "px";
                                menu.style.top = this.offsetHeight + "px";
                        }
                        menu.style.visibility = "visible";
                        currentMenu = menu;
                }

                starter.onfocus         = function() {
                        this.onmouseover();
                }

                starter.onblur         = function() {
                        this.onmouseout();
                }

                menu.showMenu = function() {
                        menu.style.visibility = "visible";
                        currentMenu = menu;
                        stopTime();
                }

                menu.hideMenu = function()  {
                        if (!timerOn) {
                                 mytimer = setTimeout("killMenu('" + menuId + "');", 500);
                                timerOn = true;
                        }
                }

                menu.onmouseout = function(event) {
                        this.hideMenu();
                }

                starter.onmouseout = function() {
                        menu.hideMenu();
                }
}
        function killMenu(amenu) {
                var menu = document.getElementById(amenu);
                menu.style.visibility = "hidden";
                stopTime();
        }
        function stopTime() {
                if (mytimer) {
                          clearTimeout(mytimer);
                         mytimer = null;
                         timerOn = false;
                }
        }

  window.onload = function() {
                        initialiseMenu("menu1", "menu1Starter");
                        initialiseMenu("menu2", "menu2Starter");
                        initialiseMenu("menu3", "menu3Starter");
                        initialiseMenu("menu4", "menu4Starter");
                        initialiseMenu("menu5", "menu5Starter");
                        initialiseMenu("menu6", "menu6Starter");
                        initialiseMenu("menu7", "menu7Starter");
                        initialiseMenu("menu8", "menu8Starter");
        }

        ie4 = ((navigator.appName == "Microsoft Internet Explorer") &&
        (parseInt(navigator.appVersion) >= 4 ))
        ns4 = ((navigator.appName == "Netscape") &&
        (parseInt(navigator.appVersion) >= 4 ))

        if (ns4) {
            layerRef="document.layers";
            styleRef="";
     } else {
            layerRef="document.all";
            styleRef=".style";
     }

        function afficheCalque(calque)
        {
          eval(layerRef + '["' + calque +'"]' + styleRef +
                  '.visibility = "visible"');
        }

        function cacheCalque(calque)
        {
          eval(layerRef + '["' + calque +'"]' + styleRef +
                          '.visibility = "hidden"');
        }