function validateForm()
{
    if (document.contact.realname.value == "")
    {
        alert("Please enter your Full Name.");
        return false;
    }
    if (document.contact.email.value == "")
    {
        alert("Please enter your Email Address.");
        return false;
    }
    
    if (validate_email(document.contact.email) == false) {
        alert("Please enter a valid Email Address.");
        return false;
    }
   
    return true;
}
function validate_email(field) 
{
    with (field) {
        apos = value.indexOf("@");
        dotpos = value.lastIndexOf(".");
        if (apos < 1 || dotpos - apos < 2) {
            return false;
        }
        else {
            return true;
        }
    }
}