Widget:Test Legible

<button type="submit" id="calcular">Analizar</button>

<script> function ObtenerTexto() {

   if (0 < $(".maintext").val().length) {
       $(".statistics").text('Procesando. Ten paciencia....');        
       var a = new XMLHttpRequest;
       a.onreadystatechange = function() {
           4 == a.readyState && 200 == a.status && ($(".statistics").text(a.responseText))
       };
       var b = new FormData;
       b.append("textParameter", $(".maintext").val());    
       a.open("POST", "/cgi/ejemplo.py");
       a.send(b)
   }

}

document.getElementById("calcular").addEventListener("click", function(a) {

    ObtenerTexto();
    a.preventDefault()

});

</script>