ColdFusion : "NetworkError: 500 Internal Server Error"
===

This is the jquery code in ColdFusion index.cfm which is calling chkUsername of cfc file.

    <script type="text/javascript">
     chkUsernameUnique = function(theUsername){
      $.getJSON("selectuser.cfc", {
        method: 'chkUsername',
        Username: theUsername,
        returnformat: 'json'
    }, function(isUsernameUnique){
     
        if (isUsernameUnique == true) {
            $("#theErrorDivID").html('Username is unique');
        }
        else {
            $("#theErrorDivID").html('Please select a new username');
        }
    });
    };
    </script>


This is my component which is getting called from the cfm file.

    <cfcomponent>
    <cffunction name="chkUsername"returnformat="json" output="false">
        <cfargument name="username" required="true">
             
        <cfquery name="chkUsername" datasource="myDataSource">
        SELECT ID FROM employees_login WHERE username = <cfqueryparam value="#arguments.username#" cfsqltype="cf_sql_varchar" />
        </cfquery>
         
        <cfreturn yesNoFormat(chkUsername.recordCount) />
    </cffunction>
    </cfcomponent>


Nothing was getting displayed.
I tried to check the error on fire bug and i am getting this error -

`"NetworkError: 500 Internal Server Error:http://localhost:8500/workspace/UniqueUsername/selectuser.cfc?method=chkUsername&Username=admin&returnformat=json"`