var texte=" "
var nt=0;
var ie=0
if (navigator.appName=="Netscape") {
     document.captureEvents(Event.MOUSEDOWN);
     nt=1;}
   else ie=1
function detect(ev) {
  if ((nt&&ev.which==1)||(ie&&event.button==1)){}
    else setTimeout('alert(texte)',1);}
    document.onmousedown=detect

function click() {
if (event.button==2) {
alert('');
}
}
document.onmousedown=click