function FormIsValid()
    {
    var Ilast = document.getElementById('last_name');
    var Ifirst = document.getElementById('first_name');
    var Iphone = document.getElementById('phone');
    var Icompany = document.getElementById('company');
    var Iemail = document.getElementById('email');
    var Icountry = document.getElementById('country');
    var Ilanguage = document.getElementById('00N40000001gzy4');
    
    var retour = true;
    
    if (Iemail.value.length<1 || Iemail.value.indexOf('@',0)<0 || Iemail.value.indexOf('.',0)<0)
        {
        Iemail.style.backgroundColor = "#FBB";
        retour = false;
        }
    if (Icountry.value.length<1)
        {
        Icountry.style.backgroundColor = "#FBB";
        retour = false;
        }
    if (Ilanguage.value.length<1)
        {
        Ilanguage.style.backgroundColor = "red";
        retour = false;
        }
    if (Ilast.value.length<1)
        {
        Ilast.style.backgroundColor = "#FBB";
        retour = false;
        }
    if (Ifirst.value.length<1)
        {
        Ifirst.style.backgroundColor = "#FBB";
        retour = false;
        }
    if (Iphone.value.length<1)
        {
        Iphone.style.backgroundColor = "#FBB";
        retour = false;
        }
    if (Icompany.value.length<1)
        {
        Icompany.style.backgroundColor = "#FBB";
        retour = false;
        }
    if(retour==false)
        alert('Please complete all mandatory fields before submitting your information.');
    return retour;
    }