registration.cfm

<cfoutput>  
    <cfform name="registration" id="registration">
    <h2>Detailed Registration:</h2>
         <cfquery name="getStates" datasource="TestDB">
            select 	*
            from 	shema_countries
         </cfquery>
        
        <div class="registrationLabel">
            Country
        </div>
        <div class="registrationValue">
            <cfselect name="Country" id="Country">
                <option id="state0" value="0">--State--</option>
                <cfloop query="getStates">
                    <option id="state#ctr_code#" value="#ctr_code#">#ctr_name#</option>
                </cfloop>
            </cfselect>
        </div>
        
        <div class="registrationLabelNS" style="width:65px;">
            State
        </div>
        <div class="registrationValue">
            <cfselect name="State" id="State" bind="cfc:update.myFunction1({Country})" bindOnLoad="yes" display="StateName" value="StateID" selected="" style="width:220px;" />
        </div>
    </cfform>
</cfoutput>

update.cfc

<cfcomponent>
    <cffunction name="myFunction1" access="remote" returntype="any">
  	<cfargument name="Country" type="string" required="yes">
       
        <cfquery name="getCities" datasource="TestDB">
        	select *
            from	shema_states
            where StateCtrCode = <cfqueryparam cfsqltype="cf_sql_varchar" value="#Country#">
            order by StateName
        </cfquery>
		<cfreturn getCities>
        
	</cffunction>
</cfcomponent>