function CheckContact () { 
    var errorMsg = "";
    var quantity = 0;
    var nanQuantity = 0;
    
    if (document.contact_info.clientname.value == "") {
        errorMsg += "\nPlease enter your name.\n";    
    }

    if (document.contact_info.organization.value == "") {
        errorMsg += "\nPlease enter your organization.\n"; 
    }

    if (document.contact_info.mailingaddress.value == "") {
        errorMsg += "\nPlease enter your mailing address.\n";   
    }

    if (document.contact_info.city.value == "") {
        errorMsg += "\nPlease enter your city.\n";   
    }

    if (document.contact_info.state.value == "") {
        errorMsg += "\nPlease enter your state.\n";   
    }

    if (document.contact_info.zip.value == "") {
        errorMsg += "\nPlease enter your ZIP code.\n";   
    }

    if (document.contact_info.phone.value == "") {
        errorMsg += "\nPlease enter your phone number.\n";   
    }

    if (document.contact_info.email.value == "") {
        errorMsg += "\nPlease enter your email address.\n";   
    }

    if (errorMsg != "") {
        errorMsg += alert(errorMsg + "\n\n");
        return false;
    }

    return true;
}