function ULPager(tableName, itemsPerPage) {
    this.tableName = tableName;
    this.itemsPerPage = itemsPerPage;
    this.currentPage = 1;
    this.pages = 0;
    this.inited = false;

    this.showRecords = function(from, to) {
        //var rows = document.getElementById(tableName).rows;

    var ul = document.getElementById(tableName);
        var i = 0, rows = 0;
        while (ul.getElementsByTagName('li')[i++]) {
            rows++;
        }

        // i starts from 1 to skip table header row
        for (var i = 1; i < rows; i++) {
            if (i < from || i > to)
                ul.getElementsByTagName('li')[i].style.display = 'none';
            else
                ul.getElementsByTagName('li')[i].style.display = '';
        }
    }

    this.showPage = function(pageNumber) {
        if (!this.inited) {
            alert("not inited");
            return;
        }

        var oldPageAnchor = document.getElementById('pg' + this.currentPage);
        oldPageAnchor.className = '';

        this.currentPage = pageNumber;
        var newPageAnchor = document.getElementById('pg' + this.currentPage);
        newPageAnchor.className = 'current';

        var from = (pageNumber - 1) * itemsPerPage + 1;
        var to = from + itemsPerPage - 1;
        this.showRecords(from, to);
    }

    this.prev = function() {
        if (this.currentPage > 1)
            this.showPage(this.currentPage - 1);
    }

    this.next = function() {
        if (this.currentPage < this.pages) {
            this.showPage(this.currentPage + 1);
        }
    }

    this.init = function() {
    var ul = document.getElementById(tableName);
        var i = 0, rows = 0;
        while (ul.getElementsByTagName('li')[i++]) {
            rows++;
        }
        var records = (rows - 1);
        this.pages = Math.ceil(records / itemsPerPage);
        this.inited = true;
    }

    this.showPageNav = function(pagerName, positionId) {
        if (!this.inited) {
            alert("not inited");
            return;
        }
        var element = document.getElementById(positionId);
        if (this.pages > 0) {
            var pagerHtml = '<div class="f-right pagging">';
            for (var page = 1; page <= this.pages; page++)
                pagerHtml += '<a href="javascript:' + pagerName + '.showPage(' + page + ');" id="pg' + page + '" class="">' + page + '</a>';
            pagerHtml += '</div>';
        }
        element.innerHTML = pagerHtml;
    }
}