------引自：http://bbs.blueidea.com/thread-2673442-1-1.html
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"
?contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>?
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions"? prefix="fn" %>
<%
?String path = request.getContextPath();
?String basePath = request.getScheme() + "://"
???+ request.getServerName() + ":" + request.getServerPort()
???+ path + "/";
%>
<HTML>
<HEAD>
<TITLE> JSP+Ajax 添加删除Checkbox实例 example test</TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script type="text/javascript">
function $() {
? var elements = new Array();
? for (var i = 0; i < arguments.length; i++) {
??? var element = arguments[i];
??? if (typeof element == 'string')
????? element = document.getElementById(element);
??? if (arguments.length == 1)
????? return element;
??? elements.push(element);
? }
? return elements;
}
//cody by jarry;
var emptyCol="",overCol="#f1f1f1",checkedCol="#F4FFF4";
function getAbsoluteLeft( ob ){
?if(!ob){return null;}
?? var obj = ob;
?? var objLeft = obj .offsetLeft;
?? while( obj != null && obj .offsetParent != null && obj .offsetParent.tagName != "BODY" ){
???? objLeft += obj .offsetParent.offsetLeft;
???? obj = obj .offsetParent;
?? }
?return objLeft ;
}
// get absolute TOP position
function getAbsoluteTop( ob ){
?if(!ob){return null;}
?var obj = ob;
?var objTop = obj .offsetTop;
?while( obj != null && obj .offsetParent != null && obj .offsetParent.tagName != "BODY" ){
?? objTop += obj .offsetParent.offsetTop;
?? obj = obj .offsetParent;
?}
?return objTop ;
}
String.prototype.trim = function()
{ return this.replace(/(^\s*)|(\s*$)/g, "");}
function isExist(child,obj){?
?//obj has element the child;
?? for(var i=0;i<obj.elements.length;i++){
??? if(obj.elements[i].tagName.toLowerCase()=="input" && obj.elements[i].type=="checkbox"){
?????? if(obj.elements[i].value==child)return true;
??? }
?? }
?? return false;
}
function validateURL(url){
?//validateURL
?if(url.search(/^[A-Za-z0-9 -]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/)!=0){
?return false;
?//}else if(url.substring(0,4)=="www."){
?//return false;
?}else{
?return true;
?}
}
function countLength(obj){
?if(obj==null)return;
?var dLen = 0,sLen = 0;
?for(i=0; i< obj.length; i++ ){
?? if(obj.charCodeAt(i) > "0" && obj.charCodeAt(i) < "128")
???? sLen+=1;
?else
????? dLen+=2;
?}
? totalLen = sLen+dLen;
? return totalLen;
}
var strAll=unescape("%u5168%u9009");
var canAll=unescape("%u53D6%u6D88");
function clickchk(obj){
var allcheck=true;
?? for(var i=0;i<obj.elements.length;i++){
??? var eli = obj.elements[i];
??? if(eli.tagName.toLowerCase()=="input" && eli.type=="checkbox"){
?? eli.parentNode.style.backgroundColor = eli.checked ? checkedCol :"";
????? if(eli.checked==false){allcheck=false;}
???? }
? }
? obj.elements["check"].value=allcheck?canAll:strAll;?
}
function addSite(obj){
? var url=obj.url.value.trim();
? if(url.match(/^\s*$/g) || !validateURL(url)){alert("请输入正确网址：如mysite.com");obj.url.focus();return;}
? if(isExist(url,obj)){alert("你添加的网址已经存在列表中");return;}
? var list=document.getElementById("list");
? var chkbox=document.createElement("input");
? chkbox.type="checkbox";
? chkbox.onclick=function(){clickchk(obj);}//全部选择后check按钮显示取消;
? chkbox.value=url;
? chkbox.name="url_chkbox";
? var hr=document.createElement("hr");
? hr.size="0";hr.style.borderTop="1px solid gray";
? var txt=document.createTextNode(url);?
? var div=document.createElement("div");
? div.appendChild(chkbox);
? div.appendChild(txt);
? div.style.borderBottom="1px dashed gray";
? div.style.padding="5px";
? //div.appendChild(hr);
? //div.style.backgroundColor = "olive";
? div.onmouseover=function(){
?? showDelete(this);
? }
? div.onmouseout=function(){
?? hideDelete(this);
? }
?
? list.appendChild(div);
//end add;
//如果已经添加了多选框则去掉禁用;
? if(obj.check.disabled==true){
??? obj.check.disabled=false;
??? obj.recheck.disabled = false;
??? obj.remove.disabled=false;
??? }
return false;
}
function checkall(obj){//全选or取消全选;
?var chk=obj.elements["check"];
?? for(var i=0;i<obj.elements.length;i++){
??? if(obj.elements[i].tagName.toLowerCase()=="input" && obj.elements[i].type=="checkbox"){
????? if(chk.value==strAll){//check all checkbox input;
????? obj.elements[i].checked=true;
?? obj.elements[i].parentNode.style.backgroundColor = checkedCol;
????? }else{
?????? obj.elements[i].checked=false;
??? obj.elements[i].parentNode.style.backgroundColor = emptyCol;
????? }
????????
??? }
? }
? if($('list').childNodes.length<=1)return;
? chk.value=chk.value==canAll?strAll:canAll;
? //更改全选/取消的显示;
}
function reverseCheck(obj){
? ?var chk=obj.elements["check"];
?? for(var i=0;i<obj.elements.length;i++){
??? if(obj.elements[i].tagName.toLowerCase()=="input" && obj.elements[i].type=="checkbox"){
????? obj.elements[i].checked = obj.elements[i].checked ? false : true;
??? }
??? clickchk(obj);
? }
}
function del(list,obj){
//删除list的内容
? var candel=false;
? var i=list.childNodes.length;
? var end = -1;
?? while(? i > end ){? //如果存在child
???? var? s=list.childNodes[i];
? if(typeof(s)!="undefined"? && s.tagName){
???????? try{ //如果child的类型不为空;
????????? var tgname = s.tagName.toUpperCase();
????if(tgname != "DIV" || s.childNodes.length <=0 )return;
????//子集是div且还有子集
??????????????? var s1 = s.childNodes[0];
????if( s1.type.toLowerCase() =="checkbox" && s1.checked==true ){
????//如果该子集里的checkbox选中,那么删除改子集(div);
???? candel = true;??
???? list.removeChild(s);
????? }???
????????? }catch(ex){
?????????? //alert(ex.toString());????????
???????? }
?????? }
???????
????? i--;
?? }
?? if(candel==false){alert("请选择你要删除的选项")}
?
isDisabledButton();
????
}
function isDisabledButton(){
? var objform=document.sitelist;
? var list=$("list");
?var hasDivChild = false;
?if(list.childNodes.length>0 ){
? for(var i=0;i<list.childNodes.length;i++){
???? var s=list.childNodes[i];
??if( typeof(s)!="undefined"? && s.tagName) {
???if(s.tagName.toUpperCase()=="DIV")
???hasDivChild = true;
??}
? }
?}
? objform.check.disabled= hasDivChild?false:true;
? objform.recheck.disabled= hasDivChild?false:true;
? objform.check.value=strAll;
? objform.remove.disabled= hasDivChild?false:true;
}
function delSingle(objparent,objdel,objchild){
??? objparent.removeChild(objchild);
?????? objdel.style.display="none";
//
?? isDisabledButton();
?
}
function editSingle(objparent,objedit,objchild){
?
? function makeLink(text , tag){
?? var temobj = document.createElement(tag);
?? temobj.style.marginLeft="5px"; temobj.style.marginRight="5px";
?? temobj.style.textDecoration="underline";temobj.style.cursor="pointer";
?? temobj.appendChild( document.createTextNode(text) );
??? return temobj;?
? }
? try{
? var secondChild = objchild.childNodes[1];
? var url = secondChild;
? var urlStr =? url.nodeValue ;//? url.nodeValue : url.toString() ;
???? if(urlStr==null || urlStr.trim=="")return;
? var editorPanel = document.createElement("span");
? objchild.removeChild(url);
? var editor = document.createElement("input");
? editor.type="text";
? //var maxLen = parseInt(objparent.style.width) - 250;
? var maxLen = 50;
???? var thisLen = parseInt( countLength(urlStr) );
? editor.size =? maxLen > thisLen ? thisLen : maxLen;
? editor.value = urlStr;
???? editor.select();
? editor.onmouseover=function(){this.select();}
? var update =? makeLink("update","font");update.title="更新";
? update.onclick=function(){
???? //updateContens();
??????? var newvalue = editor.value;
??if(newvalue.trim() == ""){editor.focus();return;}
???? objchild.removeChild(objchild.childNodes[1]);
???? objchild.appendChild(document.createTextNode(newvalue));
? }
? var cancle =? makeLink("cancle","font");cancle.title="取消";
? cancle.onclick=function(){
???? objchild.removeChild(objchild.childNodes[1]);
???? objchild.appendChild(url);
? }
? //add to editorPanel;
? editorPanel.style.fontSize="11px";
? editorPanel.style.color="blue";
???? editorPanel.appendChild(editor);
???? editorPanel.appendChild(update);
???? editorPanel.appendChild(document.createTextNode("|"));
???? editorPanel.appendChild(cancle);
? //add to objchild;
? objchild.appendChild(editorPanel);
?? }catch(ex){
????? alert(ex.toString());
?? }finally{
????? //
?? }
}
var currentDiv;
function showDelete(self){
? self.style.backgroundColor = overCol;
?currentDiv = self;
?var theid = "del_icon";
?if(!$(theid)){
? var delDiv=document.createElement("div");
? delDiv.id=theid;
? var d=delDiv;
? d.style.textAlign="center";d.style.fontSize="11px";
? var edit = document.createElement("span");
? edit.title="编辑此条";edit.style.textDecoration="underline";
???? edit.onclick=function(){
???????? editSingle(currentDiv.parentNode,this.parentNode,currentDiv);
? }
? var del =? document.createElement("span");
? del.title="删除此条";del.style.textDecoration="underline";
???? del.onclick=function(){
???????? delSingle(currentDiv.parentNode,this.parentNode,currentDiv);
? }
? edit.appendChild(document.createTextNode("edit"));
???? d.appendChild(edit);
???? d.appendChild(document.createTextNode(" | "));
? del.appendChild(document.createTextNode("delete"));
???? d.appendChild(del);
? d.style.width="80px";
? d.style.lineHeight="20px";
? d.style.color="blue";
?// d.style.zIndex="-10";
//? d.style.backgroundColor="green";
? document.body.appendChild(d);
? $(theid).onmouseover=function(){
????? currentDiv.style.backgroundColor = overCol;
?? this.style.display="";
?? //mouseOndeleteDiv=true;
? }
? //
? $(theid).style.cursor="pointer";
?}
?if($(theid)){
?? $(theid).style.display="";
?? var l= getAbsoluteLeft(self) + self.offsetWidth - 80;
?? var t= getAbsoluteTop(self) + 5;
?? var scrollT = self.parentNode.scrollTop;//减去出现滚动条的高度;
?? var t= getAbsoluteTop(self) + 5 - scrollT;
?? $(theid).style.position="absolute";
?? $(theid).style.left = l+"px";
?? $(theid).style.top = t+"px";
?}
}
function hideDelete(self){
?var theid = "del_icon";
? if( $(theid) ){
?? self.style.backgroundColor = self.childNodes[0].checked?checkedCol:emptyCol;
?? $(theid).style.display="none";
? }
}
</script>
</HEAD>
<BODY>
<style>
.drag{position:absolute;width:600px; background-color:#f1f1f1;
filter:alpha(opacity=100);
??? -moz-opacity:1.0;
??? opacity:1.0;
?}
.da{width:100%;background-color:gray;cursor:move;font-size:14px;vertical-align:middle;line-height:30px}
.max_min_btn{float:right;color:red;cursor:pointer;font-size:9pt;width:50px;line-height:30px;text-align:center;}
#list{border-top:2px ridge #9A9898;border-left:2px ridge #9A9898;border-bottom:1px solid #D4D0C8;border-right:1px solid #D4D0C8;background:white;width:578px;height:350px;margin:10px;overflow:auto}
.shadowBottom{margin-left:6px;height:5px;background:gray;font-size:0px;line-height:0px;filter:alpha(opacity=55);-moz-opacity:0.55;opacity:0.55;}
</style>
<pre>
本例是采用JSP + Ajax + 文本来演示多选、全选，添加、删除、更新checkbox多选框的效果。
本例充分展现了利用JavaScript控制HTML DOM以及利用XML http 传递数据，利用JSP操作文本的效果。
1，JavaScript 用来控制页面内容的现实与增删效果;
2，JSP作为后台，对文本进行读取、写入、更新等操作;
3，文本格式是用来存储数据的，数据编码UTF-8;<br>4, 本例子在win32,Red hat Linux 9下 jdk1.5,Tomcat 5.0,Apache 2.5下调试通过，同时兼容Firefox 1.0,Opera 8.0,IE6。
<br>在线说明文档 <a href="http://jiarry.blogchina.com/5599587.html">http://jiarry.blogchina.com/5599587.html</a><br>静态页面演示地址：<A href="http://jarryli.googlepages.com/checkbox_test.html">http://jarryli.googlepages.com/checkbox_test.html</A> (详细的说明，随后补充)<BR>源文件下载地址：<A href="http://jarryli.googlepages.com/checkbox.rar">http://jarryli.googlepages.com/checkbox.rar</A>
<br>
另外之前做的<br>
PHP+Ajax 发帖程序实例:<a href="http://jiarry.blogchina.com/5555296.html">http://jiarry.blogchina.com/5555296.html</a>? 源码下载:<a href="http://jarryli.googlepages.com/post_ajax.rar">http://jarryli.googlepages.com/post_ajax.rar</a><br>
JSP登录证码无刷新提示:<a href="http://jiarry.blogchina.com/5287654.html">http://jiarry.blogchina.com/5287654.html</a> 源码下载:<a href="http://jarryli.googlepages.com/imgValidate.rar">http://jarryli.googlepages.com/imgValidate.rar</a><br>
<br>
<div class="drag" rel="drag" id="siteMainDarg" style="left:10px;top:10px;" onMouseDown="dargit(this,event);">
<div class="da" ><span class="max_min_btn" id="max_min" style="background-color:#333"><font style="font-family:webdings">2</font>CLOSE</span> 拖拽区</div>
<div id="sitelistDiv" >
<form name="sitelist" onSubmit="return addSite(this);" style="border:1px groove blue;margin:0;padding:0;border-top:0;"><br clear="all">
http:// <INPUT TYPE="text" size="30" NAME="url" onmouseover="this.focus()"> <INPUT TYPE="button" NAME="add" value="添加网址至列表" onClick="addSite(this.form)">
<div id="list">
<div onMouseOver="showDelete(this);"? onmouseout="hideDelete(this);" style="padding:5px;border-bottom:1px dashed gray"><input type=checkbox value="example.com" name="url_chkbox" onClick="clickchk(this.form)">example1.com </div>
<div onMouseOver="showDelete(this);" onMouseOut="hideDelete(this);"? style="padding:5px;border-bottom:1px dashed gray"><input type=checkbox? value="example.com" name="url_chkbox" onClick="clickchk(this.form)">example2.com </div>
</div>
<INPUT TYPE="button" NAME="check" value="全选" disabled onClick="checkall(this.form)"> <input type="button" value="反选" name="recheck" disabled? onclick="reverseCheck(this.form)"> <INPUT TYPE="button" NAME="remove" disabled value="删除" onClick="del($('list'),this.form)"><br><br>
</form>
</div>
<div class="shadowBottom"> </div>
</div><br><br><br>
Cody by JarryLi@gmail.com;
<br>
CopyRight?Jarry,All right reserved!<br>
本例仅供个人参考，引用请保留版权信息。谢谢！
<br>
homepage:<a href="http://jiarry.126.com">jiarry.126.com</a><br>
Blog:<a href="http://jiarry.blogchina.com">http://jiarry.blogchina.com</a>
<script>
//页面加载时初始化
function init(l,f){
? var list=l;
? f.check.disabled=list.childNodes.length>1?false:true;
? f.recheck.disabled=list.childNodes.length>1?false:true;
? f.check.value=strAll;
? f.remove.disabled=list.childNodes.length>1?false:true;
}
window.onload=function(){
?init($("list"),document.sitelist);
}
activeCookie = true;
if(document.cookie==null){
?//alert("cookie没有开启！");
? activeCookie = false;
}
function getCookie(name) {
??? if( !activeCookie? ) return;
?var nameEQ = name + "=";
?var ca = document.cookie.split(';');
?for(var i=0;i < ca.length;i++) {
??var c = ca[i];
??while (c.charAt(0)==' ') c = c.substring(1,c.length);
??if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
?}
?return null;
}
function setCookie(name , value)
{
??? if( !activeCookie? ) return;
?var expdate = new Date();
?expdate.setTime(expdate.getTime() + (365*24*120));
?document.cookie=""+ name + "=" + value +";expires="+ expdate.toGMTString();
}
var theLeft = getCookie("siteMainDargLeft")!=null ? getCookie("siteMainDargLeft") : 10;
var theTop = getCookie("siteMainDargTop")!=null ? getCookie("siteMainDargTop") : 10;
var listDivDisplay =? getCookie("sitelistDivDisplay")!=null ? getCookie("sitelistDivDisplay") : "";
$("siteMainDarg").style.top = theTop;
$("siteMainDarg").style.left = theLeft;
$("sitelistDiv").style.display = listDivDisplay;
//cookie end;
////////////////////////
var d_width = 550;
var d_height = 30;
var ey=0,ex=0,lx=0,ly=0,canDrg=false,thiso=null;//
var x, y,rw,rh;
?var divs=document.getElementsByTagName("div");
?for (var i=0;i<divs.length;i++){?
?? if(divs[i].getAttribute("rel")=="drag"){
???? divs[i].onmousemove=function(){
???? thismove(this);//实时得到当前对象与鼠标的值以判断拖动及关闭区域;
??}
?? }
?}
function thismove(o){
??? rw = parseInt(x)-parseInt(getAbsoluteLeft(o));
??? rh = parseInt(y)-parseInt(getAbsoluteTop(o));
}
function dargit(o,e){
thiso = o;
canDrg = true;
?if(!document.all){
????? lx = e.clientX; ly = e.clientY;
????? }else{
??????? lx = event.x; ly = event.y;
?? }
?
?try{//设置渐变色;
? if(rh<=d_height && rw<d_width &&rh>0){//设定在拖动区域
?? if(document.all)thiso.filters.Alpha.opacity=80;
?? else thiso.style.MozOpacity=80/100;
? }
}catch(e){
}
?st(o);
}
document.onmousemove = function(e){
if(!document.all){ x = e.clientX; y = e.clientY; }else{ x = event.x; y = event.y; }
if(canDrg){
?? if(rh<=d_height && rw<d_width &&rh>0){//如果要设定拖动区域可以作判断
??var ofsx = x - lx;
??thiso.style.left = (parseInt(thiso.style.left) + ofsx) +"px";
??lx = x;
??var ofsy = y - ly;
??thiso.style.top = (parseInt(thiso.style.top) + ofsy) +"px";
??ly = y;
?? }else{
??? canDrg=false;
?? }
?}
}
document.onmouseup=function(){
???? canDrg=false;//拖拽变量设为false
?try{
? if(document.all)thiso.filters.Alpha.opacity=100;
? else thiso.style.MozOpacity=100;
}catch(e){}
???? if(document.all && thiso != null){
???????? thiso.releaseCapture();
??????? thiso = null;
?? }
}
function st(o){
? if(rh <= d_height && rw >= d_width){
?? canDrg=false;
?? showHide($("sitelistDiv"));
?? }
}
function showHide(obj,self){
?? obj.style.display = obj.style.display=="none"?"":"none";
?? //$("del_icon").display="none";
?? var icon = "1";
?? var text = "OPEN";
?? if(obj.style.display==""){
???? icon = "2";
???? text = "CLOSE";
?? }
??? $("max_min").childNodes[0].innerHTML = icon;
?$("max_min").childNodes[1].nodeValue = text;
}
window.onunload = function(){
?? setCookie("siteMainDargLeft",getAbsoluteLeft( $("siteMainDarg") ) );
?? setCookie("siteMainDargTop",getAbsoluteTop( $("siteMainDarg") ) );
?? setCookie("sitelistDivDisplay",$("sitelistDiv").style.display );
??
}
</script>
</BODY>
</HTML>