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Javascript form check with variable from database

Posted on 2003-10-27
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Last Modified: 2013-12-24
How can i check an input of a textbox and make sure its not greater than a variable that is set in my database.

My need is to ask a user how long it took them to read through a lesson and take some questions on the content they just read.  In the database there is a variable that will act as the Max number of credits they are allowed to recieve.  So for instance for one lesson, the max credits they can recieve is '2'.  Then in the form where it will ask how long it took them.  So for any answer over 2, I would like an alert box to pop up and say that it is over the maximum allowed credits when they hit the submit button.  Is this possilbe.

Thanks,
Jeff
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Question by:jeffmace
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4 Comments
 
LVL 9

Accepted Solution

by:
CFDevHead earned 2000 total points
ID: 9629085
here is quick and dirty script
<cfset  myVariable=2>
<cfoutput>
<script>
function chkCredits(f){
      var maxCredits = #myVariable#;
      if (f.credits.value > maxCredits){
            alert('That it is over the maximum allowed credits.')
            return false;
      }else{
            return true;
      }
}
</script>
</cfoutput>
<form action="index.cfm" onsubmit="return chkCredits(this)">

<input type="text" name="credits">

<input type="submit">

</form>

good luck
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Author Comment

by:jeffmace
ID: 9629528
For some reason it doesn't seem to be working.  It's just going to the requested page even though i am entering in a 6 when the max value can be a 1
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LVL 9

Expert Comment

by:CFDevHead
ID: 9629548
Here is a working example: http://sylvansupply.com/test.cfm
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Author Comment

by:jeffmace
ID: 9629682
My fault, I forgot I had <CFFORM> in there.  Maybe you can help me with the other questions I just posted regarding Javascripts and forms.
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