/*  
* jQuery pager plugin 1.0  
* (c) Jon Paul Davies  
* Dual licensed under the MIT and GPL licenses
* Example: http://jonpauldavies.github.com/JQuery/Pager/PagerDemo.html 
*/  
(function($) {   
  
    $.fn.pager = function(options) {   
  
        var opts = $.extend({}, $.fn.pager.defaults, options);   
  
        return this.each(function() {   
  
            $(this).empty().append(renderpager(parseInt(options.pagenumber), parseInt(options.pagecount), options.buttonClickCallback));               
        });
    };   
  
    function renderpager(pagenumber, pagecount, buttonClickCallback) {   
  
        var $pager = $('<ul class="pages"></ul>');   
  
        $pager.append(renderButton('<<', pagenumber, pagecount, buttonClickCallback)).append(renderButton('<', pagenumber, pagecount, buttonClickCallback));   
  
        var startPoint = 1;   
        var endPoint = 5;   
  
        if (pagenumber > 2) {   
            startPoint = pagenumber - 2;   
            endPoint = pagenumber + 2;   
        }   
  
        if (endPoint > pagecount) {   
            startPoint = pagecount - 3;   
            endPoint = pagecount;   
        }   
  
        if (startPoint < 1) {   
            startPoint = 1;   
        }   
  
        for (var page = startPoint; page <= endPoint; page++) {   
  
            var currentButton = $('<li class="page-number">' + (page) + '</li>');   
  
            page == pagenumber ? currentButton.addClass('pgCurrent') : currentButton.click(function() { buttonClickCallback(this.firstChild.data); });   
            currentButton.appendTo($pager);   
        }   
  
        $pager.append(renderButton('>', pagenumber, pagecount, buttonClickCallback)).append(renderButton('>>', pagenumber, pagecount, buttonClickCallback));   
  
        return $pager;   
    }   
  
    function renderButton(buttonLabel, pagenumber, pagecount, buttonClickCallback) {   
  
        var $Button = $('<li class="pgNext">' + buttonLabel + '</li>');   
  
        var destPage = 1;   
  
        switch (buttonLabel) {   
            case "<<":   
                destPage = 1;   
                break;   
            case "<":   
                destPage = pagenumber - 1;   
                break;   
            case ">": 
                destPage = pagenumber + 1;   
                break;   
            case ">>":   
                destPage = pagecount;   
                break;   
        }   
  
        if (buttonLabel == "<<" || buttonLabel == "<") {   
            pagenumber <= 1 ? $Button.addClass('pgEmpty') : $Button.click(function() { buttonClickCallback(destPage); });   
        }   
        else {   
            pagenumber >= pagecount ? $Button.addClass('pgEmpty') : $Button.click(function() { buttonClickCallback(destPage); });   
        }   
  
        return $Button;   
    }   
  
     $.fn.pager.defaults = {   
        pagenumber: 1,   
        pagecount: 1  
    };   
  
})(jQuery);