jQuery(document).ready(function () {

    //min font size
    var min=9;

    //max font size
    var max=16;

    //grab the default font size
    var reset = jQuery('body').css('fontSize');

    //font resize these elements
    var elm = jQuery('body');

    //set the default font size and remove px from the value
    var size = str_replace(reset, 'px', '');

    //Increase font size
    jQuery('a.fontSizePlus').click(function() {

            //if the font size is lower or equal than the max value
            if (size<=max) {

                    //increase the size
                    size++;

                    //set the font size
                    elm.css({'fontSize' : size});
            }

            //cancel a click event
            return false;

    });

    jQuery('a.fontSizeMinus').click(function() {

            //if the font size is greater or equal than min value
            if (size>=min) {

                    //decrease the size
                    size--;

                    //set the font size
                    elm.css({'fontSize' : size});
            }

            //cancel a click event
            return false;

    });

    //Reset the font size
    jQuery('a.fontReset').click(function () {

            //set the default font size
             elm.css({'fontSize' : reset});
    });

});

//A string replace function
function str_replace(haystack, needle, replacement) {
    var temp = haystack.split(needle);
    return temp.join(replacement);
}