本文实例讲述了jQuery pager.js 插件动态分页功能。分享给大家供大家参考，具体如下：

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pager.js 代码

function Page(opt){
   var set = $.extend({num:null,startnum:1,elem:null,callback:null},opt||{});
   if(set.startnum>set.num||set.startnum<1){
     set.startnum = 1;
   }
   var n = 0,htm = '';
   var clickpages = {
     elem:set.elem,
     num:set.num,
     callback:set.callback,
     init:function(){
      this.elem.next('div.pageJump').children('.button').unbind('click')
      this.JumpPages();
      this.elem.children('li').click(function () {
        var txt = $(this).children('a').text();
        var page = '', ele = null;
        var page1 = parseInt(clickpages.elem.children('li.active').attr('page'));
        if (isNaN(parseInt(txt))) {
         switch (txt) {
           case '下一页':
            if (page1 == clickpages.num) {
              return;
            }
            if (page1 >= (clickpages.num - 2) || clickpages.num <= 6 || page1 < 3) {
              ele = clickpages.elem.children('li.active').next();
            } else {
              clickpages.newPages('next', page1 + 1);
              ele = clickpages.elem.children('li.active');
            }
            break;
           case '上一页':
            if (page1 == '1') {
              return;
            }
            if (page1 >= (clickpages.num - 1) || page1 <= 3 || clickpages.num <= 6) {
              ele = clickpages.elem.children('li.active').prev();
            } else {
              clickpages.newPages('prev', page1 - 1);
              ele = clickpages.elem.children('li.active');
            }
            break;
           case '首页':
            if (page1 == '1') {
              return;
            }
            if (clickpages.num > 6) {
              clickpages.newPages('首页', 1);
            }
            ele = clickpages.elem.children('li[page=1]');
            break;
           case '尾页':
            if (page1 == clickpages.num) {
              return;
            }
            if (clickpages.num > 6) {
              clickpages.newPages('尾页', clickpages.num);
            }
            ele = clickpages.elem.children('li[page=' + clickpages.num + ']');
            break;
           case '...':
            return;
         }
        } else {
        //   if ((parseInt(txt) >= (clickpages.num - 3) || parseInt(txt) <= 3) && clickpages.num > 6) {
        //    clickpages.newPages('jump', parseInt(txt));
        //   }
        //   ele = $(this);
        // }
        // page = clickpages.actPages(ele);
        // if (page != '' && page != page1) {
        //   if (clickpages.callback){
        //    clickpages.callback(parseInt(page));
        //   }
        var i = parseInt(txt);
        if(isNaN(i)||(i<=0)||i>clickpages.num){
         return;
        }else if(clickpages.num>6){
         clickpages.newPages('jump',i);
        }else{
         var ele = clickpages.elem.children('li[page='+i+']');
         clickpages.actPages(ele);
         if (clickpages.callback){
           clickpages.callback(i);
         }
         return;
        }
        if (clickpages.callback){
         clickpages.callback(i);
        }
        }
      });
     },
     //active
     actPages:function (ele) {
      ele.addClass('active').siblings().removeClass('active');
      return clickpages.elem.children('li.active').text();
     },
     JumpPages:function () {
      this.elem.next('div.pageJump').children('.button').click(function(){
        var i = parseInt($(this).siblings('input').val());
        if(isNaN(i)||(i<=0)||i>clickpages.num){
         return;
        }else if(clickpages.num>6){
         clickpages.newPages('jump',i);
        }else{
         var ele = clickpages.elem.children('li[page='+i+']');
         clickpages.actPages(ele);
         if (clickpages.callback){
           clickpages.callback(i);
         }
         return;
        }
        if (clickpages.callback){
         clickpages.callback(i);
        }
      })
     },
     //newpages
     newPages:function (type, i) {
      var html = "",htmlLeft="",htmlRight="",htmlC="";
      var HL = '
...
';
      html = '
首页
'
      for (var n = 0;n<5;n++){
        htmlC += '
'+(i+n-1)+'
';
        htmlLeft += '
'+(n+2)+'
';
        htmlRight += '
'+(set.num+n-5)+'
';
      }
      switch (type) {
        case "next":
         if(i<=4){
           html+='
1
'+htmlLeft+HL+'
'+set.num+'
';
         }else if(i>=(set.num-3)){
           html+='
1
'+HL+htmlRight+'
'+set.num+'
';
         }else{
           html += '
1
'+HL+htmlC+HL+'
'+set.num+'
';
         }
         break;
        case "prev":
         if(i<=4){
           html+='
1
'+htmlLeft+HL+'
'+set.num+'
';
         }else if(i>=(set.num-3)){
           html+='
1
'+HL+htmlRight+'
'+set.num+'
';
         }else{
           html += '
1
'+HL+htmlC+HL+'
'+set.num+'
';
         }
         break;
        case "首页" :
         html+='
1
'+htmlLeft+HL+'
'+set.num+'
';
         break;
        case "尾页" :
         html+='
1
'+HL+htmlRight+'
'+set.num+'
';
         break;
        case "jump" :
         if(i<=4){
           if(i==1){
            html+='
1
'+htmlLeft+HL+'
'+set.num+'
';
           }else{
            html+='
1
'+htmlLeft+HL+'
'+set.num+'
';
           }
         }else if((i>=set.num-3)&&(set.num>=7)){
           if(i==set.num){
            html+='
1
'+HL+htmlRight+'
'+set.num+'
';
           }else{
            html+='
1
'+HL+htmlRight+'
'+set.num+'
';
           }
         }else{
           html += '
1
'+HL+htmlC+HL+'
'+set.num+'
';
         }
      }
      html += '
尾页
';
      if (this.num > 5 || this.num < 3) {
        set.elem.html(html);
        clickpages.init({num:set.num,elem:set.elem,callback:set.callback});
      }
     }
   }
   if(set.num<=1){
     $(".pagination").html('');
     return;
   }else if(parseInt(set.num)<=6){
     n = parseInt(set.num);
     var html='
首页
';
     for(var i=1;i<=n;i++){
      if(i==set.startnum){
        html+='
'+i+'
';
      }else{
        html+='
'+i+'
';
      }
     }
     html +='
尾页
';
     set.elem.html(html);
     clickpages.init();
   }else{
     clickpages.newPages("jump",set.startnum)
   }
}

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