How to send parameters to custom complex business object to WCF service using jQuery AJAX

Dear Sir

I am trying to call web service from jquery..trying following way but i am not able to pass to complex type parameter to WCF service

 My wcf function is as follows

<OperationContract()>
   <Web.WebGet(UriTemplate:="/GetData?strErrMsg={strErrMsg}&chrErrFlg={chrErrFlg}", ResponseFormat:=WebMessageFormat.Json, BodyStyle:=WebMessageBodyStyle.Wrapped)> _
    Function GetData(ByRef strErrMsg As System.Collections.Generic.List(Of String), ByRef chrErrFlg As String) As String

strErrMsg is System.Collections.Generic.List(Of String)

I am trying to call as follows

 var Type;
        var Url;
        var Data;
        var ContentType;
        var DataType;
        var ProcessData;
        var parameters;
       
        function CallWcfService() {
            jQuery.ajax
            (
             {
                 type: Type,
                 url: Url,
                 data: Data, //'{"strErrMsg":"1"},{"chrErrFlg":"A"},{"pcocd":"1"},{"pdiv":"1"},{"ploc":"1"}', // '{'strErrMsg':'1'},{'chrErrFlg':'A'},{'pcocd':'1'},{'pdiv':'1'},{'ploc':'1'}',
                 contentType: ContentType, //"application/json, charset=utf-8", // content type sent to server
                 dataType: DataType, //Expected data format from server
                 cache: "false",
                 crossDomain: true,   //Same result if i remove this line
                 processdata: ProcessData, //True or False
                 success: function (msg) 
                 {
                     ServiceSucceeded(msg);
                 },
                 error: ServiceFailed// When Service call fails
             }
           );
        }



        function callService() 
        {
            //alert("1");
            DataType = "jsonp";
            Type = "GET";
            var par = 4;
            parameters = null; 
            Url = "http://192.168.2.42/CWSERVERWCF/bedtypemasterService.svc/GetData?strErr             Msg=Y&chrErrFlg=c";
            ContentType = "application/json; charset=utf-8";
            ProcessData = true;
            //alert("sssssasasadsds");
            CallWcfService();
        }

And I am able to call other methods in same way having string and integer parameter.

I have gone through this but didnt get anything

http://stackoverflow.com/questions/17782981/how-to-invoke-wcf-service-having-list-parameter