function checkInput() {

  var inputOK   = true;

  var errorMsg  = "";



  if (document.forms[0].name.value == "") {
    errorMsg += "Name";

    inputOK = false;
  }



  if (document.forms[0].email.value == "") {
    if (errorMsg == "") {
      errorMsg += "Email";
    }
    else {
      errorMsg += ", Email";     
    }

    inputOK = false;
  }

 


  if (document.forms[0].company.value == "") {
    if (errorMsg == "") {
      errorMsg += "Company";
    }
    else {
      errorMsg += ", Company";
    }

    inputOK = false;
  }




  if (document.forms[0].agentNumber.value == "") {
    if (errorMsg == "") {
      errorMsg += "Agent Number";
    }
    else {
      errorMsg += ", Agent Number";
    }

    inputOK = false;
  }




  if (document.forms[0].truckNumber.value == "") {
    if (errorMsg == "") {
      errorMsg += "Truck Number";
    }
    else {
      errorMsg += ", Truck Number";
    }

    inputOK = false;
  }




  if (document.forms[0].phone.value == "") {
    if (errorMsg == "") {
      errorMsg += "Phone";
    }
    else {
      errorMsg += ", Phone";
    }

    inputOK = false;
  }




  if ( (document.forms[0].currentCustomer[0].checked != true) &&
       (document.forms[0].currentCustomer[1].checked != true)) {
    if (errorMsg == "") {
      errorMsg += "Current Customer (Yes/No)";
    }
    else {
      errorMsg += ", Current Customer (Yes/No)";
    }

    inputOK = false;
  }




  if (inputOK == true) {
    document.forms[0].submit();
  }
  else {
    errorMsg = "Please provide input for the following fields:  " + errorMsg;
    alert(errorMsg);
  }

}