javascript实现分页

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JavaScript HTML

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>添加信息</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">
<script type="text/javascript" src="./js/wpCalendar.js">
</script>
<style type="text/css">

</style>
</head>
<body>
<div align="center">
<h1>
显示有的用户界面
</h1>
<div
style="border: 1px red solid; margin-bottom: 100px; padding: 10px 10%">
<table border="1px" cellpadding="0" cellspacing="0" id="tusers"
style="font: 15px">
<thead>
<tr>
<th>
<input type="checkbox" name="chbk" id="chbk1" />
</th>
<th>
名称
</th>
<th>
性别
</th>
<th>
邮箱
</th>
<th>
出生日期
</th>
<th>
操作
</th>
</tr>
</thead>
<tbody id="users">
</tbody>
</table>
<table>
<tr>
<td colspan="6">
<span><a href="#" onClick="fenye(0)">上一页</a> </span>   
<span><a href="#" onClick="fenye(2)">下一页</a> </span>   
<span><a href="#" onClick="fenye(1)">首页</a> </span>   
<span><a href="#" onClick="fenye(-1)">末页</a> </span>
</td>
</tr>
</table>
</div>
<div style="border: 1px blue solid;">
<form>
<table id="divs">
<tbody id="addUsers" style="font: 14px">
<tr>
<td>
用户名:
</td>
<td>
<input type="text" name="name" id="name" />
</td>
</tr>
<tr>
<td>
性别:
</td>
<td>
<select id="sex">
<option value="男">
男
</option>
<option value="女">
女
</option>
</select>
</td>
</tr>
<tr>
<td>
邮箱:
</td>
<td>
<input type="text" name="email" id="email" />
</td>
</tr>
<tr>
<td>
出生日期:
</td>
<td>
<input type="text" id="bir" name="bir" />
<input type=button value="点击看我"
onclick="showCalendar(this,document.all.bir)">
</td>
</tr>
<tr id="addu">
<td colspan="2">
<input type="button" value="添加" onClick="addUser()" id="add" />
</td>
</tr>
<tr id="addu1">
<td colspan="2">
<input type="button" value="修改" id="upduser" />
</td>
</tr>
</tbody>
</table>
</form>
</div>
</div>
</body>
</html>
<script>
var PAGESIZE = 5;
var nowpage = 1;
window.onload = function() {
document.getElementById("addu1").style.display = "none";

}

function addUser() {
var name = document.getElementById("name").value;
var sex = document.getElementById("sex").value;
var email = document.getElementById("email").value;
var bir = document.getElementById("bir").value;

//获取表格节点对象
var tusers = document.getElementById("tusers");

//创建行
var tr1 = document.createElement("tr");
var cbk = document.createElement("td");
var tname = document.createElement("td");
var tsex = document.createElement("td");
var temail = document.createElement("td");
var tbir = document.createElement("td");
var toper = document.createElement("td");

var cbk1 = document.createElement("input");
cbk1.setAttribute("type", "checkbox");
cbk1.setAttribute("name", "chbk");

cbk.appendChild(cbk1);
tname.appendChild(document.createTextNode(name));
tsex.appendChild(document.createTextNode(sex));
temail.appendChild(document.createTextNode(email));
tbir.appendChild(document.createTextNode(bir));
var adelete = document.createElement("a");
var aupdate = document.createElement("a");

adelete.setAttribute("href", "#");
aupdate.setAttribute("href", "#");

adelete.appendChild(document.createTextNode("删除 |"));
aupdate.appendChild(document.createTextNode("修改"));
toper.appendChild(adelete);
toper.appendChild(aupdate)

//往行中添加
tr1.appendChild(cbk);
tr1.appendChild(tname);
tr1.appendChild(tsex);
tr1.appendChild(temail);
tr1.appendChild(tbir);
tr1.appendChild(toper);

var users = document.getElementById("users");
users.appendChild(tr1);
tusers.appendChild(users);

//删除操作
adelete.onclick = function() {
users.removeChild(adelete.parentNode.parentNode);
}

//修改操作
aupdate.onclick = function() {
document.getElementById("addu").style.display = "none";
document.getElementById("addu1").style.display = "block";

var utr = aupdate.parentNode.parentNode;
var utrs = utr.childNodes;

document.getElementById("name").value = utrs[1].innerHTML;
document.getElementById("sex").value = utrs[2].innerHTML;
document.getElementById("email").value = utrs[3].innerHTML;
document.getElementById("bir").value = utrs[4].innerHTML;

var upUser = document.getElementById("upduser");

upUser.onclick = function() {
utr.childNodes[1].innerHTML = document.getElementById("name").value;
utr.childNodes[2].innerHTML = document.getElementById("sex").value;
utr.childNodes[3].innerHTML = document.getElementById("email").value;
utr.childNodes[4].innerHTML = document.getElementById("bir").value;
document.getElementById("addu1").style.display = "none";
document.getElementById("addu").style.display = "block";
}

}

fenyeLength();

}

function fenyeLength() {
var trs = document.getElementById("users");
var size = trs.childNodes.length;
var trss = trs.childNodes;
if (trss.length > PAGESIZE) {
for ( var i = 0; i < size; i++) {
trss[i].style.display = "none";
}
var st = size - PAGESIZE;
for ( var i = 0; i < PAGESIZE; i++) {
trss[st].style.display = "block";
st++;
}
}

}
function fenye(nowP) {
var trs = document.getElementById("users");
//总计录数
var countRecord = trs.childNodes.length;
var trUsers = trs.childNodes;
//转换标识符
var page = parseInt(nowP);
//总页数
var countPage = (countRecord % PAGESIZE == 0 ? countRecord / PAGESIZE
: Math.ceil(countRecord / PAGESIZE));
//判断最后一页
if (page == -1) {
nowpage = countPage;
if (nowpage > 1) {
var startindex = (nowpage - 1) * PAGESIZE;
for ( var i = 0; i < countRecord; i++) {
if (i < startindex) {
trUsers[i].style.display = "none";
} else {
trUsers[i].style.display = "block";
}
}
}
//判断点击首页时的操作
} else if (page == 1) {
nowpage = 1;
//显示首页的记录
indexPageInfo(countRecord, trUsers);
//判断点击上一页时的操作
} else if (page == 0) {
if (nowpage - 1 > 1) {
nowpage -= 1;
} else {
nowpage = 1;
indexPageInfo(countRecord, trUsers);
}

//显示上一页记录
var startindex = (nowpage - 1) * PAGESIZE;
var endindex = startindex + PAGESIZE;
PageInfo(startindex, endindex, countRecord, trUsers);
//判断点击下一页时的操作
} else if (page == 2) {

if (nowpage + 1 >= countPage) {
nowpage = countPage;
} else {
nowpage += 1;
}
//显示上一页记录
var startindex = (nowpage - 1) * PAGESIZE;
var endindex = startindex + PAGESIZE;
PageInfo(startindex, endindex, countRecord, trUsers)
}
}

//首页的显示记录
function indexPageInfo(countRecord, trUsers) {
if (countRecord <= PAGESIZE) {
for ( var i = 0; i < countRecord; i++) {
trUsers[i].style.display = "block";
}
} else {

for ( var i = 0; i < countRecord; i++) {
if (i < PAGESIZE) {
trUsers[i].style.display = "block";
} else {
trUsers[i].style.display = "none";
}
}
}
}
//上一页下一页的显示记录
function PageInfo(startindex, endindex, countRecord, trUsers) {
for ( var i = 0; i < countRecord; i++) {
if (i >= startindex && i < endindex) {
trUsers[i].style.display = "block";
} else {
trUsers[i].style.display = "none";
}
}

}
</script>

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