function validateform () {

valid = true;

// Check name field is not empty
if (document.form.name.value == "") {
document.getElementById("name").innerHTML = "Name* (required)";
valid = false;
}

 else {
 document.getElementById("name").innerHTML = "Name*";

}

// Check message field is not empty
if (document.form.message.value == "") {
document.getElementById("message").innerHTML = "Message* (required)";
valid = false;
}

 else {
 document.getElementById("message").innerHTML = "Message*";

}

// Check email field follows proper syntax
var str = document.form.email.value
var regexp = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
if (!str.match(regexp)) {
document.getElementById("email").innerHTML = "Email* (valid email required)";
valid = false;
}

 else {
 document.getElementById("email").innerHTML = "Email*";

}

return valid;
}