checkbox父子联动问题（一下午没搞定）

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checkbox父子联动问题（一下午没搞定）5

这是网上摘的一段代码，现在选择一个子checkbox父的不能被选中，我想要实现在子checkbox中点击一个父checkbox也被选中。
求教各位牛人

父类
<input type="checkbox" name="father" forcheckboxgroup="groupname1"/>

子类
<input type="checkbox" name="son" group="groupname1"/>
<input type="checkbox" name="son" group="groupname1"/>
<input type="checkbox" name="son" group="groupname1"/>

实现代码
<script type="text/javascript">
//JS checkbox类型父子联动
function CheckboxGroup(){
var arrelement = document.all;
var i=0;
while(i<arrelement.length){
var forgroupattrib = arrelement[i].getAttribute('forcheckboxgroup');
if(forgroupattrib != null && forgroupattrib != ''){
arrelement[i].setAttribute('groupmember',_getGroupMember(arrelement[i]));

if(arrelement[i].tagName.toLowerCase() == 'input' && arrelement[i].type == 'checkbox'){
arrelement[i].onclick=function(){
//----------------------Checked All------------------
var groupmember = this.getAttribute('groupmember');
var i = 0;
while(i<groupmember.length){
groupmember[i].checked = this.checked;
i++;
}
//---------------------------------------------------
}
}
_setState(arrelement[i]);
}
i++;
}
}
function _getGroupMember(o){
var groupname = o.getAttribute('forcheckboxgroup');
var items = new Array;
var inputs = document.getElementsByTagName('input');
var i=0;
while(i<inputs.length){
if(inputs[i].type == 'checkbox'){
var groupattrib = inputs[i].getAttribute('group');
if(groupattrib == groupname){
items[items.length] = inputs[i];
var master = inputs[i].getAttribute('groupmaster');
if (master == null) {
master = new Array;
master[0] = o.uniqueID;
inputs[i].setAttribute('groupmaster', master);
}
else{
master[master.length] = o.uniqueID;
}
inputs[i].onpropertychange = function(){
if (event.propertyName == 'checked') {
var arro = this.getAttribute('groupmaster');
var i = 0;
while (i < arro.length) {

_setState(document.getElementById(arro[i]));
i++;
}
}
}
}
}
i++;
}
return items;
}

function _setState(o){
var master = o;
if(master!=null){
var chkselall = true;
var chknosel = true;
var chkselone = true;
var groupmember = master.getAttribute('groupmember');
var i = 0;
while(i<groupmember.length){

if(chkselall){
chkselall = groupmember[i].checked;

}
if(chknosel){
chknosel = !groupmember[i].checked;

}
i++;
}

if(master.tagName.toLowerCase() == 'input'&&master.type=='checkbox'){

if (chkselall || (!chkselall&&!chknosel)) {

master.checked = true;
}
if (chknosel) {

master.checked = false;
}

}
else{
master.disabled = chknosel;
}
}
}
window.attachEvent('onload',CheckboxGroup);
</script>

JavaScript

2009年8月03日 17:05

Distoto
25
0 0 0

1个答案按时间排序按投票排序

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采纳的答案

<html>
<head>
</head>
<body>
<div id="wrap">
<input type="checkbox" name="father"  forcheckboxgroup="groupname1"/>

<input type="checkbox" name="son" group="groupname1"/>
<input type="checkbox" name="son" group="groupname1"/>
<input type="checkbox" name="son" group="groupname1"/>  
</div>
<input type="button" value="ok" />
<script>
function unionCheckbox(){
 var fathers = document.getElementsByName("father");
 if(fathers == 0)return;
 var father = fathers[0];
 var sons = document.getElementsByName("son");
 if(sons == 0)return;
 father.onchange = function(){
  var checked = father.checked;
  eachSons(function(ckb){
   ckb.checked = checked;
  })
 }

 var eachSons = function(fun){
   for(var i=0,l=sons.length; i<l; i++){
     var ason = sons[i];
     fun(ason);
   }
 }

 eachSons(function(ckb){
   ckb.onchange = function(){
    if(ckb.checked){//任何一个checkbox被选中，父checkbox也选中
      if(!father.checked)father.checked = true;
    }else{
      //如果子checkbox全部取消选择，则父checkbox也取消选择
      var qty = 0;
      eachSons(function(ckb){
        if(ckb.checked == false)qty++;
      })
      if(qty == sons.length)father.checked = false;
    }
   }
  })
}

unionCheckbox();
</script>
</body>
</html>

2009年8月04日 11:23