A very easy-to-use front-end paging js tool class

/**
* pageSize,  每页显示数
* pageIndex, 当前页数  
* pageCount  总页数
* url  连接地址
* pager(10, 1, 5, 'Index')使用方法示例
*/
function pager(pageSize, pageIndex, pageCount, url) {
    var intPage = 7;  //数字显示
    var intBeginPage = 0;//开始的页数
    var intEndPage = 0;//结束的页数
    var intCrossPage = parseInt(intPage / 2); //显示的数字
    var strPage = "<div class=&#39;fr&#39;><span class=&#39;pageinfo&#39;>第 <font color=&#39;#FF0000&#39;>" + pageIndex + "/" + pageCount + "</font> 页 每页 <font color=&#39;#FF0000&#39;>" + pageSize + "</font> 条</span>";
    if (pageIndex > 1) {
        strPage = strPage + "<a class=&#39;pageNav&#39; onclick=&#39;" + url + "(1," + pageSize + ")&#39;><span>首页</span></a> ";
        strPage = strPage + "<a class=&#39;pageNav&#39; onclick=&#39;" + url + "(" + (pageIndex - 1) + "," + pageSize + ")&#39;><span>上一页</span></a> ";
    }
    if (pageCount > intPage) {//总页数大于在页面显示的页数
        if (pageIndex > pageCount - intCrossPage) {//当前页数>总页数-3
            intBeginPage = pageCount - intPage + 1;
            intEndPage = pageCount;
        }
        else {
            if (pageIndex <= intPage - intCrossPage) {
                intBeginPage = 1;
                intEndPage = intPage;
            }
            else {
                intBeginPage = pageIndex - intCrossPage;
                intEndPage = pageIndex + intCrossPage;
            }
        }
    } else {
        intBeginPage = 1;
        intEndPage = pageCount;
    }
    if (pageCount > 0) {
        for (var i = intBeginPage; i <= intEndPage; i++) {
            {
                if (i == pageIndex) {//当前页
                    strPage = strPage + " <a class=&#39;current&#39; href=&#39;javascript:void(0);&#39;>" + i + "</a> ";
                }
                else {
                    strPage = strPage + " <a class=&#39;pageNav&#39; onclick=&#39;" + url + "(" + i + "," + pageSize + ")&#39; title=&#39;第" + i + "页&#39;>" + i + "</a> ";
                }
            }
        }
    }
    if (pageIndex < pageCount) {
        strPage = strPage + "<a class=&#39;pageNav&#39; onclick=&#39;" + url + "(" + (pageIndex + 1) + "," + pageSize + ")&#39;><span>下一页</span></a> ";
        strPage = strPage + "<a class=&#39;pageNav&#39; onclick=&#39;" + url + "(" + pageCount + "," + pageSize + ")&#39;><span>尾页</span></a> ";
    }
    return strPage+"</div>";
}

<div class="paging">
            <div id="dvPager" class="page fr clearfix" style="margin: 10px 0 15px;"></div>
        </div>


 a{color:#000;text-decoration:none;}
  .clearfix:after {clear: both;content: ".";display: block;font-size: 0;height: 0;line-height: 0;visibility: hidden;}
  .fr{float:none;}
  .page a{padding:6px 12px;border:1px solid #ddd;float:left;margin-left:-1px;color:#006dae;text-align:center;}
  .page a:hover{background:#ddd;}
  .page a.current{background:#006dae;color:#fff;border:1px solid #006dae;cursor: default;}
  .page .first{margin-right:10px;}
  .pageinfo{margin-left:10px;padding:6px 12px;border:1px solid #ddd;float:left;color:#006dae;text-align:center;}


下面是调用示例 ↓
function loadData(pageIndex,pageSize){
      $.ajax({
            contentType:"application/json;charset=utf-8", 
              url:&#39;?pageNum=&#39;+pageIndex+&#39;&pageSize=&#39;+pageSize,
              type:"POST",
              dataType:"json",
              success:function(result){
                if(null != result){
                 
                    )
                    var beginIndex = (pageIndex - 1) * pageSize;
                    var endIndex = pageIndex * pageSize - 1;
                    var pageCount = parseInt((result.totalRecords / pageSize)) + (result.totalRecords % pageSize ? 1 : 0);
                    $(&#39;#dvPager&#39;).html(pager(pageSize, pageIndex, pageCount, &#39;loadData&#39;));
            }
    });
 } 

说明：
pager(pageSize, pageIndex, pageCount, &#39;XXX&#39;)该方法 最后传入的参数XXX 是调用js方法的名称