function ValidateContactForm()
{
    var name = document.ContactForm.Name;
    var email = document.ContactForm.Mail;
    var subject = document.ContactForm.Subject;
    var message = document.ContactForm.Message;
	var captchacode = document.ContactForm.CaptchaCode;

    if (name.value == "")
    {
        window.alert("Please enter your name.");
        name.focus();
        return false;
    }
    
    if (email.value == "")
    {
        window.alert("Please enter a valid email address.");
        email.focus();
        return false;
    }
    if (email.value.indexOf("@", 0) < 0)
    {
        window.alert("Please enter a valid email address.");
        email.focus();
        return false;
    }
    if (email.value.indexOf(".", 0) < 0)
    {
        window.alert("Please enter a valid email address.");
        email.focus();
        return false;
    }

    if (subject.selectedIndex < 1)
    {
        alert("Please select a subject.");
        subject.focus();
        return false;
    }
 
     if (message.value == "")
    {
        window.alert("Please enter a message.");
        name.focus();
        return false;
    }
 
     if (captchacode.value == "")
    {
        window.alert("Please enter the security code.");
        name.focus();
        return false;
    }
    return true;
}