Pagination using jquery ui

jquery.ui.pagination.js

/*
 * jQuery UI Pagination 0.1.0
 * 
 * By Alxandr
 */
 (function( $, undefined ) {
 
 var getAllElements = function(elem, excludeFirst) {
    var elm = elem.get(0);
    if(elm.tagName.toLowerCase() == 'table') {
        var ret = $(elm.rows);
    } else {
        var ret = elem.children();
    }
    if(!excludeFirst) return ret;
    return ret.filter(function(index) {
        return index != 0;
    });
 };
 
 $.widget('ui.pagination', {
    options: {
        items_per_page: 20,
        prev: 'Prev',
        next: 'Next',
        exclude_first_row: false
    },
    
    _create: function() {
        var self = this;
        this.element
            .wrap('<div class="ui-pagination" />').addClass('ui-pagination-paginated')
            .parent().append('<ul class="ui-pagination-navigation ui-helper-clearfix" />');
        
        this.nav = this.element.next('ul.ui-pagination-navigation');
        this.allElements = getAllElements(this.element, this.options.exclude_first_row);
        this.pages = Math.ceil(this.allElements.length / this.options.items_per_page) || 1;
        
        $('<li class="ui-pagination-pagelink"><a href="#pagination">' + this.options.prev + '</a></li>')
            .find('a').data('ui-pagination-page', 'prev').end()
        .appendTo(this.nav);
        for(var i = 0; i < this.pages; i++) {
            $('<li class="ui-pagination-pagelink"><a href="#pagination">' + (i + 1) + '</a></li>')
                .find('a').data('ui-pagination-page', i).end()
            .appendTo(this.nav);
        }
        $('<li class="ui-pagination-pagelink"><a href="#pagination">' + this.options.next + '</a></li>')
            .find('a').data('ui-pagination-page', 'next').end()
        .appendTo(this.nav);
        this.pagelinks = this.nav.find('li.ui-pagination-pagelink');
        this.pagelinks.find('a').bind('click', function(e) {
            e.preventDefault();
            self.selectPage($(this).data('ui-pagination-page'));
        });
        
        this.allElements.detach();
        
        this.selected = -1;
        this.selectPage('first');
    },
    
    selectPage: function(which) {
        if(which == 'first') {
            which = 0;
        } else if(which == 'last') {
            which = this.pages - 1;
        } else if (which == 'next') {
            which = Math.min(this.pages - 1, this.selected + 1);
        } else if (which == 'prev') {
            which = Math.max(0, this.selected - 1);
        }
        if(which == this.selected) return this.element;
        
        var o = this.options;
        
        this.allElements.detach().filter(function(index) {
            return index >= which * o.items_per_page && index < (which + 1) * o.items_per_page;
        }).appendTo(this.element);
        
        this.pagelinks.removeClass('ui-state-highlight').filter(':eq(' + (which + 1) + ')').addClass('ui-state-highlight');
        
        this.selected = which;
        
        return this.element;
    }
    
    
 });
 
 })(jQuery);