Get large amount of data using ajax

I have the following ajax code which am using to get the user details from the server. Am generating the html table from the server side and return the structure as a string. This works fine but i get undefined when user records are too many. What is limitation of data that can be passed in ajax ? Is there an alternative i can use to generate html table in the client side ?

 var param = {};
    param.CompanyID = $('[id*=txtCoID]').val();
    $.ajax({
        type: 'POST',
        url: 'AjaxAsync.aspx/BindActiveUsers',
        beforeSend: function () { },
        data: '{P: ' + JSON.stringify(param) + '}',
        contentType: 'application/json; charset=utf-8',
        //processData: false,
        //timeout: 1000000,
        //async: true,
        //cache: false,
        dataType: 'json',
        success: function (rsp) {
            document.getElementById('dvUsers').innerHTML = rsp.d;
        },
        error: function (error) {
            document.getElementById('dvUsers').innerHTML = error.d;
        }
    });    

Answer

The problem was caused by the request timeout but not the size of the data. Since I was using ajax updatepanel in aspx project I added AsyncPostBackTimeOut='300000000' to my ToolkitScriptManager tag and added

<system.web.extensions>
 <scripting>
  <webServices>
    <jsonSerialization maxJsonLength="300000000" />
  </webServices>
 </scripting>
</system.web.extensions>

to my Web.config file as documented here. Now I can load the data without any problem though it’s taking some time depending with the number of records returned. Thanks for your help.