tempImg=new Image(0,0); 
  tempImg.src='../images/interface/fleche_hover.gif';

  function VersionNavigateur(Netscape, Explorer) {return ((navigator.appVersion.substring(0,3) >= Netscape && navigator.appName == 'Netscape') || (navigator.appVersion.substring(0,3) >= Explorer && navigator.appName.substring(0,9) == 'Microsoft'));}
  function Over(img){if (VersionNavigateur(3.0,4.0)) img.src='../images/interface/fleche_hover.gif';}
  function Out(img){img.src='../images/interface/fleche.gif'}