function toggle(id){
	document.getElementById(id).style.display= (document.getElementById(id).style.display=='none') ? "block" : "none";
}

function swap(id){
    document.getElementById('img_principale').src = imagesarr[id];
    
    //Légende
    var tempo = unescape(legendarr[id]);
    document.getElementById('legende_fr').innerHTML = html_entity_decode(tempo);
}

function html_entity_decode(str) {
var ta=document.createElement("textarea");
ta.innerHTML=str.replace(/</g,"&lt;").replace(/>/g,"&gt;");
return ta.value;
}