Is it possible to send json object from jsp page to servlet?

Question

I have some data in jsp page entered by user. i want to send this data to servlet. i dont want to submit the form. I am using json object and adding the data into it using :

var param;

var url = 'ConfigurationServlet?ActionID=Configuration_Physical_Get';

httpRequest = new ActiveXObject("Microsoft.XMLHTTP");

httpRequest.open("POST", url, true);

httpRequest.onreadystatechange = handler(){

if (httpRequest.readyState == 4) {

    if (httpRequest.status == 200) {

        param = 'ip='+ip;
        param += 'mmv='+mmv;
        param += "tab="+tab;
}};

httpRequest.send(param);

Now i dont know how can i access this param at server side. and if i will be able to access it in servelet, next step will be to send a json object back to jsp page from servlet containing result. and i hve to display this result in jsp page dynamically. please reply. Thanks Divi