/*var visitee=false;

var carre1 = document.getElementById("touche1");
carre1.onClick=MM_changeProp('touche1','','backgroundImage','url(./images/carre_rouge.gif)','DIV');*/

function MM_changeProp(objId,x,theProp,theValue) { //v9.0
  var obj = null; with (document){ if (getElementById)
  obj = getElementById(objId); }
  if (obj){
    if (theValue == true || theValue == false)
      eval("obj.style."+theProp+"="+theValue);
    else eval("obj.style."+theProp+"='"+theValue+"'");
  }
}