Form Field Validation?

[Ken]

We have a shared hosting plan (Windows-based) with GoDaddy.com. GD.com has a
"generic" form mailer script (gdform.asp) that allows us to set up a
"Contact Us" page, which, when the user clicks "Submit" sends an email to
us.

I am a complete newbie re asp, but looking at the code, it looks to me as if
a error is generated if any of the fields are left blank--which is good. I
don't want to be getting emails that don't contain messages, or that don't
contain a return email address.

However, submitting a completely blank form results in me getting an email
with blank response fields.

Can you take a look at this code and tell me if it should be allowing blank
fields to be submitted? Are there any changes that can be made?
[code]
<%

Dim landing_page, host_url
Dim fso, outfile, filename, dirname, myFolder
Dim req_method, key, value
Dim bErr, errStr, bEmpty
On Error resume next
bErr = false
bEmpty = true
errStr = ""
Set fso = Server.CreateObject("Scripting.FileSystemObject")
host_url = Request.ServerVariables("HTTP_HOST")
req_method = Request.ServerVariables("REQUEST_METHOD")
dtNow = Now()
filename = Server.MapPath("\ssfm")
dirname = filename
filename = filename & "\gdform_" & DatePart("M", dtNow) & DatePart("D",
dtNow) & DatePart("YYYY", dtNow) & DatePart("N", dtNow) & DatePart("S",
dtNow)

Function FormatVariableLine(byval var_name, byVal var_value)
Dim tmpStr
tmpStr = tmpStr & "<GDFORM_VARIABLE NAME=" & var_name & " START>" & vbCRLF
tmpStr = tmpStr & var_value & vbCRLF
tmpStr = tmpStr & "<GDFORM_VARIABLE NAME=" & var_name & " END>"
FormatVariableLine = tmpStr
end function

Sub OutputLine(byVal line)
outfile.WriteLine(line)
end sub

if err.number = 0 then
Set outfile = fso.CreateTextFile(filename, true, false)
if err.number <0 then
bErr = true
errStr = "Error creating file! Directory may not be writable or may not
exist.
Unable to process request."
else
if(req_method = "GET") then
for each Item in request.QueryString
if item <"" then
bEmpty = false
key = item
value = Request.QueryString(item)
if(lcase(key) = "redirect") then
landing_page = value
else
line = FormatVariableLine(key, value)
Call OutputLine(line)
end if
end if
next
elseif (req_method = "POST") then
for each Item in request.form
if item <"" then
bEmpty = false
key = item
value = Request.form(item)
if(lcase(key) = "redirect") then
landing_page = value
else
line = FormatVariableLine(key, value)
Call OutputLine(line)
end if
end if
next
end if
outfile.close
end if
if(bEmpty = true) AND errStr = "" then
bErr = true
errStr = errStr & "
No variables sent to form! Unable to process request."
end if
if(bErr = false) then
if (landing_page <"") then
response.Redirect "http://" & host_url & "/" & landing_page
else
response.Redirect "http://" & host_url
end if
else
Response.Write errStr
end if
set fso = nothing
else
Response.Write " An Error Occurred creating mail message. Unable to process
form request at this time."
end if
%>
[code]

Many thanks!
Ken