how to submit form jQuery ajax with passing parameters MVC Asp.net

I want to pass dynamic parameters in $.ajax function. For that i am using following code:

$(function () {

    var postData = 0;
    $('#Index').submit(function () {
        $.ajax({
            type: 'POST',
            url: "/Home/Index",
            contentType: "app开发者_开发知识库lication/json; charset=utf-8",
            data: { 'tabindex':0},
            dataType: "html",
            success: function (data) {
                alert('Inserted');
            }

        });
        return false;
    });
});

but still i m not getting the required result. Can anybody tell me where i m wrong??

Is contentType required?. In the data: {} part, you dont need single quotes around the 'tabindex' variable.

Maybe if you explain what the actual response you get back (via firebug etc) is and what you are trying to achieve would be more helpfull.

I got the answer for this instead of passing addition parameters i have use hidden fields.