//voorkom dat er tekst wordt geselecteerd
        function disableSelectText(e){
            return false;
        }

        //voorkom dat er kan geklikt worden met de rechter en midden muisknop
        function reEnable(e){
            if(e.which == 3 || e.which == 2){
                return false;
            }
            return true;
        }

        if(navigator.appName.indexOf("Explorer")>-1)
        {
                function click()
                {
                   if(event.button==2)
                   {
                        alert('copyright of Wimpelcasting.be');
                        return;
                   }
                }
                document.onmousedown=click; 
        }
        //NS6 en Firefox
        if (window.sidebar)
        {
            //vanaf IE4.0
            document.onselectstart=new Function ("return false")
            document.onmousedown=reEnable
            document.onmouseup = reEnable;
            document.onclick=reEnable
            document.oncontextmenu = reEnable;
           
            
            //verhinder de ctrl - a (select all)
            document.onkeypress = function (evt) {
                                        if((((evt.modifiers & Event.CTRL_MASK) == Event.CTRL_MASK) || evt.ctrlKey) && (evt.which == 97))
                                            return false;
                                        else
                                            return true;
            };
        }