function displayPics(){
 var photos = document.getElementById('galerie_mini');
 var liens = photos.getElementsByTagName('a');
 var big_photo = document.getElementById('big_pict');
 for(var i=0;i<liens.length;i++){
  liens[i].onclick=function(){
	big_photo.src = this.href;
	big_photo.alt = this.title;
	return false;
  }
 }
}
window.onload = displayPics;