图像中的分页不起作用

Question

在下面的代码我有图像框架，其中有4个图像。我想分页图像。我尝试但没有分页按钮显示，我不能分页.Pls帮助我这样做。我已经放置了javascript代码， HTML代码和样式表。 代码：

<img class = "hidden" id="orginal" alt = "Goofy pic of me" runat="server" />//image 
 <div id="pageNavPosition"></div>

     <script type="text/javascript">
function Pager(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;
        // i starts from 1 to skip table header row
        for (var i = 1; i < rows.length; i++) {
            if (i < from || i > to)  
                rows[i].style.display = 'none';
            else
                rows[i].style.display = '';
        }
    }

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

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

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

        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 rows = document.getElementById(tableName).rows;
        var records = (rows.length - 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);

        var pagerHtml = '<span onclick="' + pagerName + '.prev();" class="pg-normal"> &#171 Prev </span> | ';
        for (var page = 1; page <= this.pages; page++) 
            pagerHtml += '<span id="pg' + page + '" class="pg-normal" onclick="' + pagerName + '.showPage(' + page + ');">' + page + '</span> | ';
        pagerHtml += '<span onclick="'+pagerName+'.next();" class="pg-normal"> Next &#187;</span>';            

        element.innerHTML = pagerHtml;
    }
}
            var pager = new Pager('orginal', 3); 
            pager.init(); 
            pager.showPageNav('pager', 'pageNavPosition'); 
            pager.showPage(1);
       </script>
    <style type="text/css">    
                .pg-normal {
                    color: black;
                    font-weight: normal;
                    text-decoration: none;    
                    cursor: pointer;    
                }
                .pg-selected {
                    color: black;
                    font-weight: bold;        
                    text-decoration: underline;
                    cursor: pointer;
                }
            </style>