function ValidateContactForm()
{
    var name = document.ContactForm.contact_name;
    var phone = document.ContactForm.contact_phone;
    var supp = document.ContactForm.supplier;
    var email = document.ContactForm.email;

   if(phone.value.search(/\d{3}\-\d{3}\-\d{4}/)==-1)
   {
      alert("The phone number you entered is not valid.\r\nPlease enter a phone number with the format xxx-xxx-xxxx.");
      phone.focus();
      return false;
   }

    if (name.value == "")
    {
        window.alert("Please enter your name.");
        name.focus();
        return false;
    }
    
    if (supp.value == "")
    {
        window.alert("Please enter proposed supplier, or type UNKNOWN.");
        supp.focus();
        return false;
    }
    
    if (email.value == "")
    {
        window.alert("Please enter a valid e-mail address.");
        email.focus();
        return false;
    }
    if (email.value.indexOf("@", 0) < 0)
    {
        window.alert("Please enter a valid e-mail address.");
        email.focus();
        return false;
    }
    if (email.value.indexOf(".", 0) < 0)
    {
        window.alert("Please enter a valid e-mail address.");
        email.focus();
        return false;
    }
    return true;
}