Javascript method to implement information addition, deletion, modification and query

The example in this article describes the method of adding, deleting, modifying and checking information using JavaScript. Share it with everyone for your reference. The specific implementation method is as follows:

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<body>
<div align="center">
 <h1>显示所有的用户界面</h1>
 <div style="border: 1px red solid; margin-bottom: 100px; padding: 10px 10%;">
 <table border="1px" cellpadding="0" cellspacing="0" id="tusers">
 <thead>
 <tr><th><input type="checkbox" name="chbk" id="chbk1" onclick="selectAll()"/></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>
 <div id="pages"></div> 
 </div> 
 <div style="border: 1px blue solid;">
  <form action="">
  <table id="divs">
  <tbody id="addUsers">
  <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="添加日期" onclick="showCalender(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>
<script>
window.onload = function(){
alert("onload");
document.getElementById("addu1").style.display = "none";
}
function selectAll(){
var users = document.getElementById("users");
var ips = users.getElementsByTagName("input");
var chbk = document.getElementById("chbk1");
for(var i=0;i<ips.length;i++){
ips[i].setAttribute("checked",chbk.getAttribute("checked"));
}
}
function addUser(){
alert("add");
var name = document.getElementById("name").Value;
var sex = document.getElementById("sex").Value;
var email = document.getElementById("email").Value;
var bir = document.getElementById("bir").Value;
var tusers = document.getElementById("tusers").Value;
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);
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);
adelete.onclick = function(){
users.removeChild(adelete.parentNode.parentNode);
}
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";
}
}
testPage()
}
var indexPage = document.createElement("a");
var upPage = document.createElement("a");
var downPage = document.createElement("a");
var endPage = document.createElement("a");
var nowpage = 1;
function testPage(){
var tbodyUsers = document.getElementById("users");
var trUsers = document.getElementById("tr");
var countRecord = trUsers.length;
var PAGESIZE = 2;
var countPage = (countRecord%PAGESIZE ==0&#63;countRecord/PAGESIZE:Math.ceil(countRecord/PAGESIZE));
var pages=document.getElementById("pages");
if(!pages.hasChildNodes()){
getPages(nowpage);
}
index.onclik=function(){
noepage=1;
indexPageInfo(countRecord,trUsers);
}
upPage.onclick=function(){
if(nowpage-1>1){
nowpage-=1;
}else{
nowpage=1;
indexPageInfo(countRecord,trUsers);
}
var startindex =(nowpage-1)*PAGESIZE;
var endindex=startindex+PAGESIZE;
PageInfo(startindex,endindex,countRecord,trUsers);
}
downPage.onclick=function(){
if(nowpage+1>=countPage){
nowpage=countPage;
}else{
nowpage=+1;
}
var startindex =(nowpage-1)*PAGESIZE;
var endindex=startindex+PAGESIZE;
PageInfo(startindex,endindex,countRecord,trUsers);
}
endPage.onclick=function(){
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";
}
}
}else{
indexPageInfo(countRecord,trUsers);
}
}
}
function indexPageInfo(countRecord, trUsers) {
if (countRecord <= 2) {
for ( var i = 0; i < PAGESIZE; i++) {
trUsers[i].style.display = "block";
}
} else {
for ( var i = 2; i < countRecord; i++) {
trUsers[i].style.display = "none";
}
}
}
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";
}
}
}
function getPages(numpage) {
indexPage.appendChild(document.createTextNode("首页"));
indexPage.setAttribute("href", "#");
upPage.appendChild(document.createTextNode("上一页"));
upPage.setAttribute("href", "#");
downPage.appendChild(document.createTextNode("下一页"));
downPage.setAttribute("href", "#");
endPage.appendChild(document.createTextNode("末页"));
endPage.setAttribute("href", "#");
var pages = document.getElementById("pages");
pages.appendChild(indexPage);
pages.appendChild(upPage);
pages.appendChild(downPage);
pages.appendChild(endPage);
}
</script>