$.fn.centerInClient = function (options) {
    /// <summary>Centers the selected items in the browser window. Takes into account scroll position.
    /// Ideally the selected set should only match a single element.
    /// </summary>    
    /// <param name="fn" type="Function">Optional function called when centering is complete. Passed DOM element as parameter</param>    
    /// <param name="forceAbsolute" type="Boolean">if true forces the element to be removed from the document flow 
    ///  and attached to the body element to ensure proper absolute positioning. 
    /// Be aware that this may cause ID hierachy for CSS styles to be affected.
    /// </param>
    /// <returns type="jQuery" />
    var opt = { forceAbsolute: false,
        container: window,    // selector of element to center in
        completeHandler: null
    };
    $.extend(opt, options);

    return this.each(function (i) {
        var el = $(this);
        var jWin = $(opt.container);
        var isWin = opt.container == window;

        // force to the top of document to ENSURE that 
        // document absolute positioning is available
        if (opt.forceAbsolute) {
            if (isWin)
                el.remove().appendTo("body");
            else
                el.remove().appendTo(jWin.get(0));
        }

        // have to make absolute
        el.css("position", "absolute");

        // height is off a bit so fudge it
        var heightFudge = isWin ? 2.0 : 1.8;

        var x = (isWin ? jWin.width() : jWin.outerWidth()) / 2 - el.outerWidth() / 2;
        var y = (isWin ? jWin.height() : jWin.outerHeight()) / heightFudge - el.outerHeight() / 2;
        el.css("left", x + jWin.scrollLeft());
        el.css("top", y + jWin.scrollTop());

        // if specified make callback and pass element
        if (opt.completeHandler)
            opt.completeHandler(this);
    });
}


function ajaxPost(url, data, success) {
    $.ajax({
        type: "POST",
        url: url,
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        data: JSON.stringify(data),
        success: success
    });
}

jQuery.fn.disable = function () {
    this.find(':input, :select, :submit, a').addClass('controlDisabled disabled')
        .attr('disabled', true)
        .bind('click.disable', function (e) {
            e.preventDefault;
            return false;
        });
    this.animate({ 'opacity': '0.5' });
    this.addClass('controlDisabled');

};


jQuery.fn.enable = function () {
    this.find(':input, :select, :submit, a').removeClass('controlDisabled disabled')
        .removeAttr('disabled')
        .unbind('click.disable');
    this.animate({ 'opacity': '1' });
    this.removeClass('controlDisabled');
};


function disableControls() {
    $('.controlDisabled').disable();
}

function disableAutoCompletes() {
    if (document.getElementsByTagName) {
        var inputElements = document.getElementsByTagName("input");
        for (i = 0; inputElements[i]; i++) {
            //if (inputElements[i].className && (inputElements[i].className.indexOf("disableAutoComplete") != -1)) {
            inputElements[i].setAttribute("autocomplete", "off");
            //}
        }
    }
}