function cambiaBtn1(id){
    document.getElementById(id).className="btnMenu2";
}
function cambiaBtn2(id){
    document.getElementById(id).className="btnMenu1";
}
function BtnBuble1(id){
    document.getElementById(id).className="contRightContactLink2";
}
function BtnBuble2(id){
    document.getElementById(id).className="contRightContactLink";
}