// alert("form.js");
function check(form ) {
var  errorList = "" ;
if ( form.Name.value == "" ) {errorList += "-> Name \n" ;  }
if ( form.Telephone.value == "" ) {errorList += "-> Telephone \n" ; }
if ( form.Email.value == "" ) {errorList += "-> E-mail\n" ; }
if ( form.Messages.value == "" ) {errorList += "-> Message\n" ; }
if(errorList == ""){return true}
else {alert("This fields are mandatory: \n \n" +  errorList + " \n");return false}

}