// JavaScript Document

window.onload=function(){
document.getElementById('alert').style.display="none";
document.getElementById('richiama').style.value="";
}

function close_alert(){

document.getElementById('alert').style.display="none";
document.getElementById('button').style.display="block";
document.getElementById('richiama').style.display="block";
document.getElementById('richiama').style.value="";
}

 function ck_number(){

 var numero = document.getElementById('richiama').value;

 if (isNaN(numero) || numero=="") {
document.getElementById('button').style.display="none";
document.getElementById('richiama').style.display="none";
document.getElementById('alert').style.display="block"; 
document.getElementById('alert').innerHTML="Please insert your telephone number, we will recall you in 48 hours. <br><a onclick='close_alert();' ><< go back</a>";

   } else if(numero.length < 6 ){
document.getElementById('button').style.display="none";
document.getElementById('richiama').style.display="none";
document.getElementById('alert').style.display="block"; 
document.getElementById('alert').innerHTML="Please insert a correct telephone number.  <br><a onclick='close_alert();' ><< go back</a>";

   } else{
document.getElementById('button').style.display="none";
document.getElementById('richiama').style.display="none";
 document.getElementById('alert').style.display="block";
 document.getElementById('alert').innerHTML="Telephone number sent.<br> Bye!";
	 document.modulo.method = "POST";

    document.modulo.action = "richiesta_numero.php";

    document.modulo.submit();

   }

  }