function validate_form (form)
{

    valid = true;

    if (form.name.value == "" )
    {
        alert ( "Please fill in the 'Name' field." );
        valid = false;
    }

    if ( form.email.value == "" )
    {
        alert ( "Please fill in the 'Email Address' field." );
        valid = false;
    }
   
    if ( form.phone.value == "" )
    {
        alert ( "Please fill in the 'Phone Number' field." );
        valid = false;
    }
   
    var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
    var address = form.email.value;
    if(reg.test(address) == false) {
      alert("Please enter a valid Email Address");
      valid = false;
     }



    return valid;
}