pass parameter from user choice to a query

I have a CFSELECT on the form and link to a query.

I would like to fill details information when user select thew option.

The option is at client side, since user select the option which I need pass my query to get information to fill on the details form on the same form.

I tried to use following JavaScripts which fill the details information, but browser goes to the page which I want to fill the details informaiton on the same form.

function FillInfo()
{
/*Fill Details Information*/

  var url = 'ccdDetailsInfo.cfm?MyAccount=' + document.getElementById('frmEntry').lstNumber.value;
}

I tried to use iFrame, it works and fill on the same form, but everything under iFrame disappear like footer and all other controls in the table.

<iframe id="DetailsFrame"  src="ccdDetailsInfo.cfm"</iframe>

I tried to use CFINCLUDE the file, but it does not take the paramter from client side.

The problem is the query paramter is server side query.

I am looking for a way can pass the client data to server parameter to run the query and to fill details form.

I did some reasearch for this on Google, but no luck,

If you can give me some link regarding pass parameters between client and CF server would be appreciated,

Regards,

Iccsi,