十分简单的兼容多浏览器Javascript实现分页功能

非常简单的兼容多浏览器Javascript实现分页功能

首先，创建一个page.js文件，实现客户端分页的功能，代码如下：

/*
* 客户端分页类
* @pageSize 每页显示记录数
* @tableID  分页表格ID
* @tbodyID  分页表格TBODY的ID
*/

/*
构造
*/
function PagingClass(pageSize,tableID,tbodyID) {
    this._pageSize = pageSize; //每页最大记录数
    this._tableId = tableID;
    this._tBodyId = tbodyID;
    this._rowCount = 0;//记录数
    this.pageCount = 0;//页数
    this.pageIndex = 0;//页索引
    this._curTable = null;//表格引用
    this._curTBody = null;//要分页内容
    this._curRows = 0;//记录行引用
    this._oldTBody = null;
    this._initPaging(); //初始化;
};

/*
初始化
*/

PagingClass.prototype._initPaging = function(){
    this._curTable = document.getElementById(this._tableId);
    this._curTBody = this._curTable.tBodies[this._tBodyId];
    this._curRows = this._curTBody.rows;
    this._rowCount = this._curRows.length;
    try{
        this._pageSize = (this._pageSize <= 0) || (this._pageSize>this._rowCount) ? this._rowCount : this._pageSize; 
        this.pageCount = parseInt(this._rowCount%this._pageSize == 0 ? this._rowCount/this._pageSize : this._rowCount/this._pageSize+1);
    } catch(exception){}

    this._updateTableRows_();
};

/*
下一页
*/
PagingClass.prototype.nextPage = function(){
    if(this.pageIndex + 1 < this.pageCount){
        this.pageIndex += 1;
        this._updateTableRows_();
    }
};

/*
上一页
*/
PagingClass.prototype.prePage = function(){
    if(this.pageIndex >= 1){
        this.pageIndex -= 1;
        this._updateTableRows_();
    }
};

/*
首页
*/
PagingClass.prototype.firstPage = function(){
    if(this.pageIndex != 0){
        this.pageIndex = 0;
        this._updateTableRows_();
    } 
};

/*
尾页
*/
PagingClass.prototype.lastPage = function(){
    if(this.pageIndex+1 != this.pageCount){
        this.pageIndex = this.pageCount - 1;
        this._updateTableRows_();
    }
};

/*
页定位方法
*/
PagingClass.prototype.aimPage = function(iPageIndex){
    if(iPageIndex > this.pageCount-1){
        this.pageIndex = this.pageCount - 1;
    } else if(iPageIndex < 0){
        this.pageIndex = 0;
    }else{
        this.pageIndex = iPageIndex;
    }
    this._updateTableRows_();
};

/*
执行分页时，更新显示表格内容
*/

PagingClass.prototype._updateTableRows_ = function(){
    var iCurrentRowCount = this._pageSize * this.pageIndex;
    var iMoreRow = this._pageSize+iCurrentRowCount > this._rowCount ? this._pageSize+iCurrentRowCount - this._rowCount : 0;
    var tempRows = this._cloneRows_();
    var removedTBody = this._curTable.removeChild(this._curTBody);
    var newTBody = document.createElement("TBODY");
    newTBody.setAttribute("id", this._tBodyId);

    for(var i=iCurrentRowCount; i < this._pageSize+iCurrentRowCount-iMoreRow; i++){
        newTBody.appendChild(tempRows[i]);
    }
    
    this._curTable.appendChild(newTBody);

    this._curRows = tempRows;
    this._curTBody = newTBody;
};

/*
克隆原始操作行集合
*/
PagingClass.prototype._cloneRows_ = function(){
    var tempRows = [];
    for(var i=0; i<this._curRows.length; i++){
        tempRows[i] = this._curRows[i].cloneNode(1);
    }
    return tempRows;
};

然后，创建一个html页面，比如：

        <table class="base_table" id="tbSeatList">
            <thead>

                <tr>
                    <th>
                        航空公司
                    </th>
                    <th>
                        航线
                    </th>
                    <th>
                        价格
                    </th>

                    <th>
                        航班日期
                    </th>
                    <th>
                        放位时间
                    </th>
                    <th>
                        航班号
                    </th>
                    <th>

                        放位数量
                    </th>
                    <th>
                        记录编号
                    </th>
                    <th>
                        操作
                    </th>
                </tr>
            </thead>

            <tbody id="bodyPaging">
                
                <tr>
                    <td>
                        中国东方航空公司
                    </td>
                    <td>
                        北京
                        →
                        上海
                    </td>
                    <td>
                        <span class="base_price"><dfn>¥</dfn>339</span>

                    </td>
                    <td>
                        2012-07-12
                    </td>
                    <td>
                        2012-06-26 13:28
                    </td>
                    <td>
                        MU8888 
                    </td>

                    <td>
                        2
                    </td>
                    <td>
                        GBDDEE
                    </td>
                    <td>
                        <a target="_blank" href="">
                            查看</a>

                    </td>
                </tr>
                
                <tr>
                    <td>
                        中国东方航空公司
                    </td>
                    <td>
                        上海
                        →
                        成都
                    </td>
                    <td>

                        <span class="base_price"><dfn>¥</dfn>400</span>
                    </td>
                    <td>
                        2012-07-09
                    </td>
                    <td>
                        2012-06-26 13:25
                    </td>
                    <td>

                        MU3333 
                    </td>
                    <td>
                        3
                    </td>
                    <td>
                        EFGDE
                    </td>
                    <td>
                        <a target="_blank" href="">

                            查看</a>
                    </td>
                </tr>
                
                <tr>
                    <td>
                        中国东方航空公司
                    </td>
                    <td>
                        上海
                        →
                        成都
                    </td>

                    <td>
                        <span class="base_price"><dfn>¥</dfn>400</span>
                    </td>
                    <td>
                        2012-07-12
                    </td>
                    <td>
                        2012-06-26 13:23
                    </td>

                    <td>
                        MU2345 
                    </td>
                    <td>
                        2
                    </td>
                    <td>
                        PNR012
                    </td>
                    <td>

                        <a target="_blank" href="">
                            查看</a>
                    </td>
                </tr>
                
                <tr>
                    <td>
                        中国东方航空公司
                    </td>
                    <td>

                        乌鲁木齐
                        →
                        哈尔滨
                    </td>
                    <td>
                        <span class="base_price"><dfn>¥</dfn>360</span>
                    </td>
                    <td>
                        2012-07-25
                    </td>
                    <td>

                        2012-06-26 11:28
                    </td>
                    <td>
                        mu0725 
                    </td>
                    <td>
                        3
                    </td>
                    <td>
                        123
                    </td>

                    <td>
                        <a target="_blank" href="">
                            查看</a>
                    </td>
                </tr>
                
                <tr>
                    <td>
                        中国东方航空公司
                    </td>

                    <td>
                        乌鲁木齐
                        →
                        哈尔滨
                    </td>
                    <td>
                        <span class="base_price"><dfn>¥</dfn>360</span>
                    </td>
                    <td>
                        2012-07-03
                    </td>

                    <td>
                        2012-06-26 11:06
                    </td>
                    <td>
                        mu0703 
                    </td>
                    <td>
                        2
                    </td>
                    <td>

                        12
                    </td>
                    <td>
                        <a target="_blank" href="">
                            查看</a>
                    </td>
                </tr>
                
            </tbody>
        </table>

        <br />
        <div style="float:right;">
            <table border="0" cellpadding="0" cellspacing="0">
                <tr>
                    <td>
                        <a href="javascript:void(0)" onclick="prePage();" style="color: Black;">上一页</a>
                    </td>
                    <td>

                          <span id="pageindex" style="font-weight: bold;"></span>  
                    </td>
                    <td>
                        <a href="javascript:void(0)" onclick="nextPage();" style="color: Black;">下一页</a>
                    </td>
                </tr>
            </table>
        </div>

最后，页面的head部分添加以下js，调用分页功能：

    <script type="text/javascript" src="../JS/page.js"></script>
    <script type="text/javascript" language="javascript">
        var page;

        window.onload = function () {
            if (document.getElementById('tbSeatList')) {
                page = new PagingClass(15, 'tbSeatList', 'bodyPaging');
                document.getElementById('pageindex').innerHTML = page.pageIndex + 1 + ' / ' + page.pageCount;
            }
        };

        function nextPage() {
            page.nextPage();
            document.getElementById('pageindex').innerHTML = page.pageIndex + 1 + ' / ' + page.pageCount;
        }

        function prePage() {
            page.prePage();
            document.getElementById('pageindex').innerHTML = page.pageIndex + 1 + ' / ' + page.pageCount;
        }
    </script>

十分简单的兼容多浏览器Javascript实现分页功能

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