Update a database record without refreshing a page. ASP VBscript - ajax

Question

This requests for help follows a poorly worded request for help earlier (apologies).
I have two asp/vbscript pages. The second page (containing only <% vbscript %> is called when a form on the first page is submitted.
The code on the second page causes an update to a database record and is as follows (the fields are populated from querystring variables.):
Set MyConn=Server.CreateObject("ADODB.Connection")
MyConn.Open "dsn=xxx;uid=xxx;password=xxx;"
SQLString = "UPDATE dbo_tbl_printing_tempstore SET " & fieldPrefix & "has_text1 = 'YES', " & fieldPrefix & "text = '" & fieldUpdate & "' WHERE id = " & tempid & ""
MyConn.Execute(SQLString)
MyConn.Close
Set MyConn = Nothing
All the form submit does is to cause the database update to happen - nothing else.
The page then response.redirects back to the calling page. This causes a refresh and lot of data on the first page to be lost - this is what I'm trying to avoid.
Can someone please tell me how I can carry out the update without leaving and then refreshing the calling page please? I've been told Ajax can do this but I have no experience at all of using it.
Many thanks

Answer 1

First of all, change your code to use parameters so you will be protected against SQL Injection attack:
Set MyConn=Server.CreateObject("ADODB.Connection")
MyConn.Open "dsn=xxx;uid=xxx;password=xxx;"
SQLString = "UPDATE dbo_tbl_printing_tempstore SET " & fieldPrefix & "has_text1 = 'YES', " & fieldPrefix & "text = ? WHERE id = ?"
Set MyCommand = Server.CreateObject("ADODB.Command")
Set MyCommand.ActiveConnection = MyConn
MyCommand.CommandType = 1
MyCommand.CommandText = SQLString
MyCommand.Parameters.Append(MyCommand.CreateParameter("#text", 200, 1, 0, fieldUpdate))
MyCommand.Parameters.Append(MyCommand.CreateParameter("#id", 3, 1, 0, tempid))
MyCommand.Execute()
MyConn.Close
Set MyCommand = Nothing
Set MyConn = Nothing
Having this, the next step is adding hidden frame in the first page:
<iframe id="MyFrame" name="MyFrame" style="display:none;"></iframe>
And finally simply add target to your <form> tag like this:
<form action="SecondPage.asp" target="MyFrame">
That's it... now the form will be submitted "inside" the hidden frame, will still trigger the database update and won't cause any refresh.