Mascara de Tel com 9 dígitos

mask-phone

$('input[name*="[telephone]"]').keydown( function(e){
    if (e.keyCode >= 9){
        length = this.value.length;
        if (length == 0)
          this.value += "(";
        
        if (length == 3)
          this.value += ")";  
        /*
        Testa para ver se o ddd começa com 11 e coloca maxlength para 14 
                exemplo: (11) 12345-1234
        */        
        if(/(\(11\)).+/i.test(this.value)){ 
            $(this).attr('maxlength','14');
            if (length == 9)
              this.value += "-";  
        } else {
            $(this).attr('maxlength','13');        
            if (length == 8)
              this.value += "-";   
        }        
    }
});