Why i can not send parameter to controller with ajax?

RouteTable.Routes.MapRoute(
    "ValueRoute",
    "{controller}/{action}/{value}",
    new
    {
        controller = "Yourcontroller",
        action = "Youraction",
        value = UrlParameter.Optional
    }
);

var a = new XMLHttpRequest();
a.open("GET","myscript.php?var=foo&othervar=bar",true);
a.onreadystatechange = function() {
    if( this.readyState == 4) {
        if( this.status == 200) {
            // data sent successfully
            // response is in this.responseText
        }
        else alert("HTTP error "+this.status);
    }
};
a.send();

this.GetTransactionsInputToday = function () {
    var status="complete"
    var r = '';

    $.ajax({
        url: '/Management/function1',
        contentType: "application/json; charset=utf-8",
        data: {'status': status},
        type: 'GET',
        cache: false,
        success: function (result) {
            r = result;
        }
    });

    return r;
};

public void SaveImage(@RequestBody String imgData)

$search = $request->request->get('data');

$search = $request->query->get('data');