CFselect onchange doesn't work on flash Form

Question

Hello :
I have looked for more than a week to find out answer  but couldn't fine anything.
I have cform with tye="Flash" and cfselect with query to populate the values.
I want use onchange="" after I select any value on cfselect to submit the pages and select next cfselect. But doesn't work.
Some help me
When I used onchange="submitform();" the form doesn't display.
I used geturl() and page reload but doesn't submit the page.
I use this code that i found on Adobe web page and still doesn't work.
<cfsavecontent variable="
showSelectedCheckbox">
var checkboxCount = 3;
for(var i = 1; i <= checkboxCount; i++)
     var thisItem = 'check' + i;
     if(i == itemSelect.value)
          this[thisName].enabled = true;
     else
          this[thisName].enabled = false;
</cfsavecontent>
<cfform format="flash" width="300" height="500">
     <cfinput name="check1" type="checkbox"
          label="Feed?" enabled="true" />
     <cfinput name="check2" type="checkbox"
          label="Mine?" enabled="false"/>
     <cfinput name="check3" type="checkbox"
          label="Eat?" enabled="false"/>
     <cfselect name="itemSelect" label="Select Item"
          onchange="#showSelectedCheckbox#">
          <option value="1">Animal</option>
          <option value="2">Mineral</option>
          <option value="3">Vegetable</option>
     </cfselect>
</cfform>
I read about cffromitem or cfformgroup but i don't know how used it .
Somebody Can help me to result this problem.

Answer 1

I did everything written ''it solved'' but nothing solved. I think I'll begin to use chrome :(