js加强的经典分页实例_javascript技巧

< html>

用户名:

性别：

职业：

2.
代码如下:
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 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";
}