jQuery pager.js 插件动态分页功能实例分析

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 = '<li><a>...</a></li>';      html = '<li class="topEnd"><a aria-label="Previous">首页</a></li>'      for (var n = 0;n<5;n++){        htmlC += '<li '+((n-1)==0?'class="active"':'')+' page="'+(i+n-1)+'"><a>'+(i+n-1)+'</a></li>';        htmlLeft += '<li '+((n+2)==i?'class="active"':'')+' page="'+(n+2)+'"><a>'+(n+2)+'</a></li>';        htmlRight += '<li '+((set.num+n-5)==i?'class="active"':'')+' page="'+(set.num+n-5)+'"><a>'+(set.num+n-5)+'</a></li>';      }      switch (type) {        case "next":         if(i<=4){           html+='<li page="1"><a>1</a></li>'+htmlLeft+HL+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';         }else if(i>=(set.num-3)){           html+='<li page="1"><a>1</a></li>'+HL+htmlRight+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';         }else{           html += '<li page="1"><a>1</a></li>'+HL+htmlC+HL+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';         }         break;        case "prev":         if(i<=4){           html+='<li page="1"><a>1</a></li>'+htmlLeft+HL+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';         }else if(i>=(set.num-3)){           html+='<li page="1"><a>1</a></li>'+HL+htmlRight+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';         }else{           html += '<li page="1"><a>1</a></li>'+HL+htmlC+HL+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';         }         break;        case "首页" :         html+='<li class="active" page="1"><a>1</a></li>'+htmlLeft+HL+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';         break;        case "尾页" :         html+='<li page="1"><a>1</a></li>'+HL+htmlRight+'<li class="active" page="'+set.num+'"><a>'+set.num+'</a></li>';         break;        case "jump" :         if(i<=4){           if(i==1){            html+='<li class="active" page="1"><a>1</a></li>'+htmlLeft+HL+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';           }else{            html+='<li page="1"><a>1</a></li>'+htmlLeft+HL+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';           }         }else if((i>=set.num-3)&&(set.num>=7)){           if(i==set.num){            html+='<li page="1"><a>1</a></li>'+HL+htmlRight+'<li class="active" page="'+set.num+'"><a>'+set.num+'</a></li>';           }else{            html+='<li page="1"><a>1</a></li>'+HL+htmlRight+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';           }         }else{           html += '<li page="1"><a>1</a></li>'+HL+htmlC+HL+'<li page="'+set.num+'"><a>'+set.num+'</a></li>';         }      }      html += '<li class="topEnd"><a aria-label="Next">尾页</a></li>';      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='<li class="topEnd"><a aria-label="Previous">首页</a></li>';     for(var i=1;i<=n;i++){      if(i==set.startnum){        html+='<li class="active" page="'+i+'"><a>'+i+'</a></li>';      }else{        html+='<li page="'+i+'"><a>'+i+'</a></li>';      }     }     html +='<li class="topEnd"><a aria-label="Next">尾页</a></li>';     set.elem.html(html);     clickpages.init();   }else{     clickpages.newPages("jump",set.startnum)   }}

<script type="text/javascript" charset="utf-8" src="/template/js/jquery-1.9.1.min.js"></script><script type="text/javascript" charset="utf-8" src="/template/js/pager.js"></script></head><div class="dataListPag">  <ul class="pagination" id="page1">  </ul>  <div class="pageJump">   <span>前往</span>   <input type="text"/>   <span>页</span>   <button type="button" class="button">GO</button>  </div></div><script>Page({  num:{$page_mum},        //页码数  startnum:{$page},      //当前页面有列表切换，在列表切换的时候修改数字，跳转到当前页  elem:$('#page1'),   //指定的元素  callback:function(n){ //回调函数   // 在这里请求当前跳转需要用到的数据//  alert('跳转到第'+n+'页，请求此页数据，此页有列表切换');   window.location.href='id=xigua_re:system_msg&op=private_msglist&page='+n;  }});// 数据列表的循环获取$('.userArticleType li').on('click',function () {  $('.userArticleType li').removeClass('choose');  $(this).addClass('choose')})</script>