河北重大技术需求开发第七版开发第十天

 今天实现了一个分页的功能，可以根据当前页面数据量自动分页并生成一个跳转功能

并且可以判断当前是否为第一页，是否具有上一页的功能，具体js代码如下

<div width=300 size=1 color=#5151A2 align=center 
    class="footer">
    <span id="spanFirst">第一页</span>
    <span id="spanPre">上一页</span>
    <span id="spanNext">下一页</span>
    <span id="spanLast">最后一页</span>
    第<span id="spanPageNum"></span>页/共
    <span id="spanTotalPage"></span>页
    </div>
    
    <script type="text/javascript">
    var theTable = document.getElementById("table");
    var totalPage = document.getElementById("spanTotalPage");
    var pageNum = document.getElementById("spanPageNum");
    var spanPre = document.getElementById("spanPre");
    var spanNext = document.getElementById("spanNext");
    var spanFirst = document.getElementById("spanFirst");
    var spanLast = document.getElementById("spanLast");
    var numberRowsInTable = theTable.rows.length;
    var pageSize = 4;//页面允许最大数据量
    var page = 1;
    //下一页
    function next() {
    hideTable();
    currentRow = pageSize * page;
    maxRow = currentRow + pageSize;
    if ( maxRow > numberRowsInTable )
    maxRow = numberRowsInTable;
    for ( var i = currentRow; i< maxRow; i++ ) {
    theTable.rows[i].style.display = '';
    }
    page++;
    if ( maxRow == numberRowsInTable ){
    nextText();
    lastText();
    }
    showPage();
    preLink();
    firstLink();
    }
    //上一页
    function pre() {
    hideTable();
    page--;
    currentRow = pageSize * page;
    maxRow = currentRow - pageSize;
    if ( currentRow > numberRowsInTable )
    currentRow = numberRowsInTable;
    for ( var i = maxRow; i< currentRow; i++ ) {
    theTable.rows[i].style.display = '';
    }
    if ( maxRow == 0) {//最上方列数为多少时禁止点击上一页
    preText();
    firstText();
    }
    showPage();
    nextLink();
    lastLink();
    }
    //第一页
    function first() {
    hideTable();
    page =1;//
    for ( var i = 1; i<pageSize; i++ ) {//
    theTable.rows[i].style.display = '';
    }//第一页数据量
    showPage();
    firstText();
    preText();
    nextLink();
    lastLink();
    }
    //最后一页
    function last() {
    hideTable();
    page = pageCount();
    currentRow = pageSize * (page - 1);//
    for ( var i = currentRow; i<numberRowsInTable; i++ ) {
    theTable.rows[i].style.display = '';
    }
    showPage();
    preLink();
    nextText();
    firstLink();
    lastText();
    }
    function hideTable() {
    for ( var i =1 ; i<numberRowsInTable; i++ ) {
    theTable.rows[i].style.display = 'none';
    }
    }
    function showPage() {
    pageNum.innerHTML = page;
    }
    //总共页数
    function pageCount() {
    var count =0 ;//
    if ( numberRowsInTable%pageSize !=0 ) count =1 ; //总页数
    return parseInt(numberRowsInTable/pageSize) + count;
    }
    //显示链接
    function preLink() { spanPre.innerHTML = "<a href='javascript:pre();'>上一页</a>"; }
    function preText() { spanPre.innerHTML = "上一页"; }
    function nextLink() { spanNext.innerHTML = "<a href='javascript:next();'>下一页</a>"; }
    function nextText() { spanNext.innerHTML = "下一页"; }
    function firstLink() { spanFirst.innerHTML = "<a href='javascript:first();'>第一页</a>"; }
    function firstText() { spanFirst.innerHTML = "第一页"; }
    function lastLink() { spanLast.innerHTML = "<a href='javascript:last();'>最后一页</a>"; }
    function lastText() { spanLast.innerHTML = "最后一页"; }
    //隐藏表格
    function hide() {
    for ( var i = pageSize; i<numberRowsInTable; i++ ) {
    theTable.rows[i].style.display = 'none';
    }
    totalPage.innerHTML = pageCount();
    pageNum.innerHTML = '';
    nextLink();
    lastLink();
    }
    hide();
    </script>

可以修改每一页数据的显示数量，搜索框生成的数据也可以进行分页