Reference value within Form page (as opposed to Action page)

Posted on 2004-10-14
Last Modified: 2013-12-20
ColdFusion 5.0

<td bgcolor="eeeeee"> <cfselect size="1" name="PayMethod">
                <option selected value="Invoice">Renewal</option>
                <option value="Credit Card">Credit Card</option>
              </cfselect> </td>

I wish to reference the value within the current page so as to determine what other code to display.  All of my research on the net results in FORM.#paymethod# but I need the value before it is passed to the Action page.

Question by:neiljstandley
  • 3
  • 2

Expert Comment

ID: 12313549
#Evaluate("Form." & paymethod)#

Author Comment

ID: 12314009
<td bgcolor="eeeeee"> <cfselect size="1" name="PayMethod">
                <option selected value="Invoice">Renewal</option>
                <option value="Credit Card">Credit Card</option>
              </cfselect> </td>
<cfif #Evaluate("Form." & paymethod)# is "Credit Card">

Error resolving parameter PAYMETHOD

ColdFusion was unable to determine the value of the parameter. This problem is very likely due to the fact that either:

You have misspelled the parameter name, or
You have not specified a QUERY attribute for a CFOUTPUT, CFMAIL, or CFTABLE tag.
Paymethod is the correct name, the action page inserts data to the DB w/the same name.  

Accepted Solution

black0ps earned 50 total points
ID: 12314027
I need to back up a second. I reread your question and i think I know what you mean. What you actually want is Javascript or client-side code, not server-side.

<script language="JavaScript">
function displayStuff(x) {      
      x =[x].value;
      if (x == "Invoice") {
            document.getElementById('invoice').style.display = "block";
            document.getElementById('card').style.display = "none";
      else if (x == "Credit Card") {
            document.getElementById('invoice').style.display = "none";
            document.getElementById('card').style.display = "block";
<form name="pay">
<select size="1" name="PayMethod" onChange="displayStuff(this.options.selectedIndex)">
<option value="Invoice">Renewal</option>
<option value="Credit Card">Credit Card</option>

<div id="invoice">Invoice code</div>
<div id="card" style="display:none;">Credit Card code</div>
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LVL 35

Expert Comment

ID: 12314034
Really all you need is


<cfif Form.Paymethod EQ "Credit Card">

But that is after the form is submitted.

If you want the value before the form is submitted you need javascript.

if(document.yourformname.paymethod.value == "Credit Card")
alert("You selected credit card!");

Author Comment

ID: 12314093
going to give these a try tomorrow, thx for the tips.

Author Comment

ID: 12341182
thx, that worked great for me.  guess it's time i start looking into javascript!

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