function displayTriangle(aClass)
{
    t = document.getElementById('triangle');
    d = t.childNodes[0];
    d.className = 'triangle ' + aClass;
}

function confirmDeletion()
{
    return confirm("Êtes vous sûr de vouloir supprimer cette annonce ?");
}

function setImagePrincipale(n)
{
    d = document.getElementById("preview");
    d.value = n;

    im1 = document.getElementById("btnprincip_1");
    im2 = document.getElementById("btnprincip_2");
    im3 = document.getElementById("btnprincip_3");
    im4 = document.getElementById("btnprincip_4");
    if (im1 != null)
        im1.className = "princip second";
    if (im2 != null)
        im2.className = "princip second";
    if (im3 != null)
        im3.className = "princip second";
    if (im4 != null)
        im4.className = "princip second";

    nim = document.getElementById("btnprincip_"+n);
    nim.className = "princip first";
    return;
}

function switchImageDeletion(n)
{
    d = document.getElementById("check_"+n);
    d.value = (d.value == 0) ? 1 : 0;
    
    e = document.getElementById("btnsuppr_"+n);
    e.className = (d.value == 0) ? "suppr del" : "suppr ret";
}

function checkform(formObj) {
    to_check = ["nom","prenom","adresse","mail","objet","message","adresse","objet"];
    for (var i=0; i<formObj.elements.length; i++) {
        if (to_check.contains(formObj.elements[i].name)) {
            if(formObj.elements[i].value.length < 1) {
                alert("Le champ "+formObj.elements[i].getAttribute("name")+" doit etre renseigné");
                return false;
            }
            to_check.removeAt(i);
        }
    }
    return true;
}

function checkform2(formObj) {
    to_check = ["type","surface","nom","adresse","mail","message","adresse","ville","prenom","surface","message"];
    for (var i=0; i<formObj.elements.length; i++) {
        if (to_check.contains(formObj.elements[i].name)) {
            if(formObj.elements[i].value.length < 1) {
                alert("Le champ "+formObj.elements[i].getAttribute("name")+" doit etre renseigné");
                return false;
            }
            to_check.removeAt(i);
        }
    }
    return true;
}

function switchPreview(img, url) {
    d = document.getElementById("image");
    d.src = img;
    e = document.getElementById('lienimage');
    e.href = url;
}