ajax call breaks back button, shows json instead of .html page

some.ajax.call.js

$.ajax({
    type: 'GET',
    url: document.location,
    data: {},
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function(fetched) {
        $.each($('body#grid ul.messagelist li'), function(i, e) {
            $(e).hide().fadeOut();
        });
        $('span.loading').remove();
        initMileto(fetched);
    }
});