function displayPics() 
{ 
    var photos = document.getElementById('wall_mini') ; 
    var liens = photos.getElementsByTagName('a') ; 
    var bigthingy = document.getElementById('gadinga') ; 

    for (var i = 0 ; i < liens.length ; ++i) { 
        liens[i].onclick = function() { 
            bigthingy.src = this.href; 
            return false; 
        }; 
    } 
} 
window.onload = displayPics;