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Conditional Enabling/Disabling Textbox using dropdown and visa/versa

Posted on 2011-02-23
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Last Modified: 2012-05-11
I've reached an impasse and need some help to make it over this hump. I'm working on an asp page that will have conditional validating of a textbox and a dropdown list. I created a function that looks like this:

<script LANGUAGE="javascript">
    function Toggle_AcctNumber(){
      
      if(document.Getparms.DropLineItem.value != [NOI])
        document.GetParms.AcctNumber".disabled="true";
     
      else if(document.Getparms.AcctNumber.value.length != 0)
              document.GetParms.DropLineItem.disabled=true;
    }
  </script>

and here is how i call that function in the dropdown and textbox....

 <SELECT name="DropLineItem" id=DropLineItem onclick = "Toggle_AcctNumber();" size="1" style="HEIGHT: 22px; WIDTH: 320px">


<input type="text" id="AcctNumber" name="AcctNumber" onchange = "Toggle_AcctNumber();">

can anyone tell me what i'm doing wrong? Thanks....
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Comment
Question by:khasm1972
6 Comments
 
LVL 9

Expert Comment

by:rawinnlnx9
ID: 34961939
Yes, you need to view your page source. ASP prefixes additional text to all web controls at render/run time. So view source, get the name that ASP generated and replace .DropLineItem.Disabled with the full name you found in the rendered HTML. Do this for both of your document.GetParms calls and you should be back on track.
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LVL 9

Expert Comment

by:rawinnlnx9
ID: 34961948
Now all you should replace is the .DropLineItem. with .{NEWNAME}. and the same for the other control.
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Author Comment

by:khasm1972
ID: 34962067
The control names look the same to me when I view the page source.
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LVL 40

Accepted Solution

by:
gurvinder372 earned 250 total points
ID: 34962184
replace it with

<script LANGUAGE="javascript">
    function Toggle_AcctNumber(){
     
      if(document.getElementById("DropLineItem").value != "NOI")
        document.getElementById("AcctNumber").disabled="true";
     
      else if(document.getElementById("AcctNumber").value.length != 0)
              document.getElementById("DropLineItem").disabled=true;
    }
  </script>
0
 
LVL 52

Expert Comment

by:Carl Tawn
ID: 34962237
I think rawinnlnx9 is confusing ASP with ASP.Net.

The following works for me, try comparing it with what you have:
<html>
<head>
   <script type="text/javascript">
     function Toggle_AcctNumber()
     {
        if (document.GetParms.DropLineItem.value != 'NOI')
          document.GetParms.AcctNumber.disabled = true;
        else if (document.GetParms.AcctNumber.value.length != 0)
          document.GetParms.DropLineItem.disabled = true;
     }
   </script>
</head>
<body>


    <form name="GetParms" id="GetParms">
      <select name="DropLineItem" id="DropLineItem" onclick="Toggle_AcctNumber();">
         <option value="NOI">NOI</option>
         <option value="One">One</option>
      </select>

      <input type="text" id="AcctNumber" name="AcctNumber" onchange="Toggle_AcctNumber();" />
    </form>

</body>
</html>

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Author Comment

by:khasm1972
ID: 34962282
ok...i still have some kinks to run out of it but at least it is working now.....
thanks gurvinder372....
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