function trouvele(n) { 
  var x;
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function changimg() { 
  var i,j=0,x,a=changimg.arguments; 
  document.tablo=new Array; 
  for(i=0;i<(a.length-2);i+=3)
   if ((x=trouvele(a[i]))!=null){
   document.tablo[j++]=x; 
   if(!x.oldsrc) 
   x.oldsrc=x.src; 
   x.src=a[i+2];
   }
}