Evaluating actionscript vars in coldfusion

Hi All,
     I am passing URL paramters using the geturl function to a page.
The param values come from actionscrip variables. However before I
submit the vars to the page I need to somehow encrypt the vars using a
coldfusion function. The problem I am having is that I am not able to
pass the actionscript var value to the coldfusion function.

I have tried everything I could think of but I cant seem to make it
work. Can someone plese help me with this.

Heres my code

----------------------------------
<!--- Form page form.cfm --->

<cfform format="flash" name="myform">
<cfformitem type="script">
function addBldg()
 {

   var myvar:Number;
   myvar=806;

<cfoutput>

<!--- Does not work :(. For demo purposes I have used the reverse
function which should output 608 but outputs ravym instead--->

getUrl("javascript:window.open('formsubmit.cfm?companyid=#reverse("+myvar+")#',
'PopupWin');void(0);");

</cfoutput>

<!---
Thess codes seem to work
<cfoutput>

getUrl("javascript:window.open('formsubmit.cfm?companyid="#"+myvar+"#"',
'PopupWin');void(0);");

getUrl("javascript:window.open('formsubmit.cfm?companyid=#DE("+myvar+")#',
'PopupWin');void(0);");


</cfoutput>

--->

}
</cfformitem>

<cfinput type="button" name="addbuilding"  value="Add Building"
onclick="addBldg();"/>

</cfform>
--------------------------------

<!--- Submit page formsubmit.cfm --->
<cfoutput>
#url.companyid#
</cfoutput>


Thanks a heap in advance !

Harkirat