function survol(img,mode){
  if(mode=="s"){
    tmp=document.images[img].src;
    document.images[img].src=tmp.substring(0,tmp.lastIndexOf("_")+1) + "surv" + tmp.substring(tmp.lastIndexOf("."));
  }else{
    tmp=document.images[img].src;
    document.images[img].src=tmp.substring(0,tmp.lastIndexOf("_")+1) + "norm" + tmp.substring(tmp.lastIndexOf("."));
  }
}


function ouvrirPage(page,t,l,w,h){
  window.open(page,"","toolbar=0,menubar=0,scrollbars=1,resizable=0,location=0,directories=0,top="+t+",left="+l+",width="+w+",height="+h);
}

function change(obj,texte){ // sauf pour NS4
var ecrire=(document.all)?document.all[obj]:(document.getElementById)?document.getElementById(obj):false;
 if (!ecrire){ return; }else{ ecrire.innerHTML=texte; }
}