js加强的经典分页实例
作者：
1显示的页面：
<!DOCTYPE html>
< html>
<head>
<title>js_pageusers.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
<script type="text/javascript" src="./js/pageuser.js"></script>
</head>
<body>
<div id="one" align="center">
<div>
用户名:
<input type="text" id="userName" />
性别：
<input type="text" id="userSex" />
职业：
<input type="text" id="userRole" />
<br />
<br />
<input type="button" id="addUsers" value="添加用户" />
<input type="button" id="updateUsers" value="更新用户" />
</div>
<br />
<br />
<div>
<table border="1px" cellpadding="0" cellspacing="0" width="500px;">
<thead>
<th>
用户名
</th>
<th>
性别
</th>
<th>
职业
</th>
</thead>
<tbody id="showUsers"></tbody>
</table>
<div>
<input type="button" id="firstPage" value="首页"/>
<input type="button" id="backPage" value="上一页"/>
<input type="button" id="nextPage" value="下一页"/>
<input type="button" id="lastPage" value="末页"/>
<span id="msg"></span>
</div>
</div>
</div>
</body>
</html>
2.
window.onload =function(){
var pagesize = 3;//每页显示的记录数
var recondsize = 0;//总记录数
var countpage = 0;//总页数
var nowpage= 1;
var users = new Array();//存放所有的记录
var start = 0; //保存当前页开始的记录
var end = 0 ;//保存当前页结束的记录
var domUserName = $("userName");
var domUserSex = $("userSex");
var domUserRole = $("userRole");
var domshowUsers = $("showUsers");
var addBtn = $("addUsers");
//为按钮注册事件
addBtn.onclick = function() {
//创建user对象
var user = new User(domUserName.value, domUserSex.value,
domUserRole.value);
//把user对象存放数组中
users.push(user);
recondsize = users.length; //得出总记录数
//计算出总页数
countpage = recondsize % pagesize == 0 ? recondsize / pagesize : Math
.ceil(recondsize / pagesize);
if (recondsize > pagesize) { //当总记录大于pagezie 思路 从后往前数3个数
start = recondsize-pagesize;
end=recondsize;
}else{ // pagesize start =1;
start=0;
end=recondsize; //end=实际的个数 就是 recondsize
}
//调用显示user的方法
showUser(users,start,end,recondsize,countpage,domshowUsers);
}
//获取分页相关的按钮
var firstPage = $("firstPage");
var backPage = $("backPage");
var nextPage = $("nextPage");
var lastPage = $("lastPage");
firstPage.onclick = function() {
nowpage = 1;
if (recondsize<= pagesize && recondsize > 0) {
start = 0;
end = recondsize;
}else{
start=0;
end=pagesize;
}
showUser(users,start,end,recondsize,countpage,domshowUsers);
}
backPage.onclick = function() {
nowpage = nowpage-1;//重新赋值
if(nowpage<=1){
nowpage=1;
}
if (recondsize <= pagesize && recondsize > 0) {
start = 0;
end = recondsize;
}else{
start=(nowpage-1)*pagesize;
end = (nowpage-1)*pagesize+pagesize;
}
showUser(users,start,end,recondsize,countpage,domshowUsers);
}
nextPage.onclick = function() {
nowpage = nowpage+1;//重新赋值
if(nowpage>=countpage){
nowpage=countpage;
}
if (recondsize <= pagesize && recondsize > 0) {
start = 0;
end = recondsize;
}else{
start=(nowpage-1)*pagesize;
if((nowpage-1)*pagesize+pagesize>=recondsize){
end = recondsize;
}else{
end =(nowpage-1)*pagesize+pagesize;
}
}
showUser(users,start,end,recondsize,countpage,domshowUsers);
}
lastPage.onclick = function() {
nowpage = countpage;//重新赋值
if (recondsize <= pagesize && recondsize > 0) {
start = 0;
end = recondsize;
}else{
start=(nowpage-1)*pagesize;
end = recondsize;
}
showUser(users,start,end,recondsize,countpage,domshowUsers);
}
}
//创建一个Function函数 函数是保存User对象数据的
function User(name, sex, role) {
this.name = name;
this.sex = sex;
this.role = role;
}
function $(id) {
return document.getElementById(id);
}
function showUser(users,start,end,recondsize,countpage,domshowUsers){
//清空数据
for ( var jj = 0; jj < domshowUsers.childNodes.length;) {
domshowUsers.removeChild(domshowUsers.childNodes[jj]);
}
//for循环添加的
for(var i=start;i<end;i++){
var user = users[i];//考虑
//创建一行
var tr = document.createElement("tr");
//创建列
var td1 = document.createElement("td");
//创建文本节点
var td1TextNode = document.createTextNode(user.name);
//文本节点添加到td中
td1.appendChild(td1TextNode);
//创建列
var td2 = document.createElement("td");
//创建文本节点
var td2TextNode = document.createTextNode(user.sex);
//文本节点添加到td中
td2.appendChild(td2TextNode);
//创建列
var td3 = document.createElement("td");
//创建文本节点
var td3TextNode = document.createTextNode(user.role);
//文本节点添加到td中
td3.appendChild(td3TextNode);
//把列添加到行中
tr.appendChild(td1);
tr.appendChild(td2);
tr.appendChild(td3);
//把行添加到tbody中
if(domshowUsers.hasChildNodes()){
domshowUsers.insertBefore(tr,domshowUsers.firstChild);//再最后一个数据之前添加数据
}else{
domshowUsers.appendChild(tr);//添加到末尾
}
}
document.getElementById("msg").innerHTML = "总共：{" + recondsize
+ "}条记录,共{" + countpage + "}页";
}