set variable from text entered in a text box

Question

I have 2 text boxes in a form the user can type numbers into. I just want to add the numbers they type in together and output the answer. I'm starting off simple and will get more complicated with my calculations later. I actually have the calculations working if they are entered into a database, but we need this to work on the fly depending on what the user typed into the text boxes. I am only able to set the text box values and output them, but I cannot get them to add together. I have some javascript that outputs what was typed into the boxes by using CFSet. Is this the way I should write this? Is there a way to condense the javascript, or do I need to separate each set of text box code out? Is there a different way to do this simple calculation with just Cold Fusion, or do I need the javascript to grab the numbers that are entered into the text boxes? Here's the code I have below. If you remove the CFset price and the output of Price, you'll see that this code outputs the X and Y text boxes. Thanks for your help.

<cfparam name="url.X" default="">
<cfparam name="url.Y" default="">
<cfoutput>
<script type="text/javascript">
        var pageSubmit = '#jsStringFormat(url.X)#';
        function appenX(){
            document.getElementById('submitLink').href = '?X=' +
            encodeURIComponent(
            (pageSubmit.length?pageSubmit + ', ':'') +
                document.getElementById('X').value);
        }

  var pageSubmit = '#jsStringFormat(url.Y)#';
        function appenY(){
            document.getElementById('submitLink').href = '?Y=' +
            encodeURIComponent(
            (pageSubmit.length?pageSubmit + ', ':'') +
                document.getElementById('Y').value);
        }
    </script>

    <cfform name="theForm" action="##" method="get">
        <cfinput type ="text" name="X" id="X" value=""><br />
        <cfinput type ="text" name="Y" id="Y" value="">
        <input type="submit" id="submitLink" onclick="appenX();" onclick="appenY();" value="Update">
    </cfform>

    <cfset X = #url.X#>
    <cfset Y = #url.Y#>
    <cfset Price = X + Y>

    #X#<br />
    #Y#
    #Price#

</cfoutput>

Answer 1

I was able to figure out a way to get this to work using just Cold Fusion also like this below. I just tested with a different calculation. I was just having problems with getting the text I was typing into the boxes to be used in my calculations. Thanks for your help!

<cfif NOT isDefined("form.submit")>

<cfif isDefined('form.Part')>
<cfset page.select_Part = form.Part>
</cfif>

<cfif isDefined('form.X')>
<cfset page.select_X = form.X>
</cfif>

<cfif isDefined('form.Y')>
<cfset page.select_Y = form.Y>
</cfif>

</cfif>


<cfoutput>
<form name="DropDown" method="post">

<tr>
<td> </td>
<td><table>

</tr>

<tr>
<td align=right>Shin-Etsu Part Number:</td>
<td align=left>
  <cfif Not isDefined('form.select_Part')>
    <select name="Part">
    <option selected value="">Part Number</option>
    <option value="MT0.1Px50x50x0.75T">MT0.1Px50x50x0.75T</option>
  <option value="MT4x0.05Px50x50x0.5T">MT4x0.05Px50x50x0.5T</option>
  <option value="MTP4x0.05Px15x50x0.25T">MTP4x0.05Px15x50x0.25T</option>
  <option value="MT0.1Px56x56x0.5T">MT0.1Px56x56x0.5T</option>
  </select>
    </cfif>
    </td>
</tr>

<tr>
<td class="edit" align="right">X_mm:</td>
<td>
<cfif Not isDefined('form.select_X')>
<input type="text" name="X" size="50">
</cfif>
</td>
</tr>

<tr>
<td class="edit" align="right">Y_mm:</td>
<td>
<cfif Not isDefined('form.select_Y')>
<input type="text" name="Y" size="50">
</cfif>
</td>
</tr>

<tr>
<td> </td>
<td>

<!------------------ SUBMIT/RESET FORM ------------------>
<input type="submit" onChange="this.form.submit()" value="Add"> 
<input type="reset" value="Reset">
</td>
</tr>

</table>

</form>


<cfif isDefined('page.select_Part') and isDefined('page.select_X') and isDefined('page.select_Y')>
<tr>
<td> </td>
<td><table cellpadding="4"> <td>Info:</td>
<td>#X#</td>
<td>#Y#</td>
<td>#Part#</td>

<cfset Price = Int(50/X)>
<td>#Price#</td>

</tr>
</cfif>
</CFOUTPUT>

Andy