javascript 分页实现 分页样式可自定义
/*** 创建实例的的方法* @param {Object} Class* @param {Object} params*/var newObj = function (Class,params){function _new (){if(Class._new){Class._new.call(this,params);//改变this指向}}_new.prototype = Class;return new _new();}/*** page对象*/var page = {/** * 构造函数 * @param {Object} pageSize ：一页显示多少条 * @param {Object} dataTotalCount ：总共数据条数 * @param {Object} mode : 分页模式 (1:不显示页数,只显示上一页下一页;2:待续); * @param {Object} pageItem ：一页显示多少条目页 * @param {Object} pageContainer ：容器 * @param {Function} selfReqFun : 自定义请求函数 */_new : function(options){var pageItem = options.pageItem;var pageContainer = options.pageContainer;var selfReqFun = options.selfReqFun;/** * 初始化page属性 */this.pageNo = options.pageNo;this.pageSize = options.pageSize;this.dataTotalCount = options.dataTotalCount;this.mode = options.mode;this.pageItem = pageItem == ""||pageItem == null ? this.mode = 1 : pageItem;this.pageContainer = pageContainer == "" || pageContainer == null ? (function (){var container = document.createElement("div");container.id = "pages";container.style.textAlign = "center";container.align = "center";document.getElementsByTagName("body")[0].appendChild(container);return container;})() : pageContainer;this.pageCount = Math.ceil(this.dataTotalCount/this.pageSize);this.selfReqFun = selfReqFun == null ? function(){} : selfReqFun;this.itemStyle = options.itemStyle;this.selfArgs = options.selfArgs;},/** * 注册事件 * @param {Object} target * @param {Object} eventName * @param {Object} handler * @param {Object} args */attachEvent : function (target,eventName,handler,args){var eventHandler = handler;if(args){eventHandler = function(e){handler.call(args,e);}} if(window.attachEvent){ target.attachEvent("on" + eventName, eventHandler ); } else{ target.addEventListener(eventName, eventHandler, true); } },/** * 检查pageNo是否合法 * @param {Object} pageNo */checkPageNo : function(pageNo){ if(pageNo == "" || pageNo == null || pageNo < 1) pageNo = 1; if(pageNo > this.pageCount)pageNo = this.pageCount; return pageNo;},/** * 创建分页条目 * @param {Object} pageNo */createPageTab : function(){var flag = false;//动态添加属性this.pageNo = this.checkPageNo(arguments[0]||1);var html = '';if(this.mode == 1){html += '<span title="首页" id="first"><<</span>';html += '<span title="上一页" id="prev"> < </span>';html += '<span id = '+this.pageNo+'>'+this.pageNo+'/'+this.pageCount+'</span>';html += '<span title="下一页" id="next"> > </span>';html += '<span title="末页" id="last">>></span>';}this.pageContainer.innerHTML = html;if(this.itemStyle){var itemStyle = this.itemStyle;for(var i in itemStyle){//判断对象是否为空flag = true;}if (flag) {var first = document.getElementById("first");var prev = document.getElementById("prev");var next = document.getElementById("next");var last = document.getElementById("last");first.innerHTML = "<img src="+ itemStyle.firstImg +" style='width:14px;height:14px;cursor:pointer;vertical-align:middle;'/>";prev.innerHTML = "<img src="+ itemStyle.prevImg +" style='width:14px;height:14px;cursor:pointer;vertical-align:middle;'/>"next.innerHTML = "<img src="+ itemStyle.nextImg +" style='width:14px;height:14px;cursor:pointer;vertical-align:middle;'/>"last.innerHTML = "<img src="+ itemStyle.lastImg +" style='width:14px;height:14px;cursor:pointer;vertical-align:middle;'/>"}}/** * 注册点击事件 */ var reqSpans = this.pageContainer.getElementsByTagName("span"); for(var j = 0 ; j < reqSpans.length ; j++){ var _this = reqSpans[j];_this.style.cursor="pointer"; if((_this.className || _this.getAttribute("class")).indexOf("reqSpan") > 0){this.attachEvent(_this,"click",this.requestEvent,this);} }},/** * 请求函数 * @param {Object} pageNo * @param {Object} id */requestEvent : function(e){var target = e.srcElement || e.target;if(target.nodeName.toLowerCase() === "img"){target = target.parentNode;}var id = target.id;var pageNo = this.pageNopageNo = (id === "first")? 1 :(id === "prev" && pageNo >= 1) ? this.checkPageNo(pageNo-1):(id === "next" && pageNo <= this.pageCount) ? this.checkPageNo(pageNo+1):(id === "last")? this.pageCount : 1;this.selfReqFun(pageNo);}}******************调用方法*********************** /** * 创建page对象所需的属性 */ var pageOptions = { pageNo: 0, pageSize: 3, dataTotalCount: 0,//总共有多少条数据（主要针对前台分页，如果后台已经分好，则不需此属性） mode: 1,//以怎样的方式显示分页样式 pageItem: null,//可选(如果mode不为1 这用到此属性：表示分页区一次显示多少页码) pageContainer: null,//页面显示区域 selfReqFun: tab2Req,//请求函数(一般只需传入pageNo参数即可) selfArgs: {},//自定义请求函数的参数 /* * 自定义分页区页码显示样式 */ itemStyle: { //页码自定义样式(可选) firstImg: "images/first.png", prevImg: "images/prev.png", nextImg: "images/next.png", lastImg: "images/last.png" } }; newObj(page, pageOptions).createPageTab(pageNo);//简单一句话ok！