<title>CheckBox</title>
<script language=javascript defer>
var n=document.getElementsByTagName("INPUT");
var CheckBoxNum=n.length;
var SubNodeCheckSome,SameNodeCheckSome,tf,SearchNodeName,SearchParentNodeName,SameNodeNum,SubNodeCheckedNum,SameNodeCheckedNum,SubNodeNum,SubNodeCheckedTF;
function FindParentNode(SubNodeName) //獲取上級結點名,並判斷是否被選中
{
tf=false; //初始化選中狀態
SearchNodeName=SubNodeName;
t=SubNodeName.lastIndexOf("_"); //判斷是否存在上級結點
if(t!=-1)SearchNodeName=SubNodeName.substring(0,t); //如果存在上級結點,取得上級結點名
if(document.all(SubNodeName).checked)tf=true; //判斷結點是否被選中
return SearchNodeName;
}
function CheckSubNode(NodeName) //獲取結點名,並判斷子結點是否選中
{
SubNodeCheckedTF=false; //初始化子結點選中狀態
SubNodeNum=0; //初始化子結點數目
SameNodeNum=0; //初始化同級結點數目
SubNodeCheckedNum=0; //初始化子結點被選中的數目
SameNodeCheckedNum=0; //初始化同級結點被選中的數目
SubNodeCheckSome=0; //初始化子結點半選數目
SameNodeCheckSome=0; //初始化同級結點半選數目
ParentNodeName=FindParentNode(NodeName); //取得上級結點名
SearchParentNodeName=NodeName; //當前結點名
d=NodeName.lastIndexOf("_"); //判斷是否存在上級結點
if(d!=-1)SearchParentNodeName=SearchParentNodeName.substring(0,d);//如果存在上級結點,取得上級結點名
for(i=0;i<CheckBoxNum;i++)
{
if(n[i].name.length==NodeName.length&&ParentNodeName==FindParentNode(n[i].name))
{
SameNodeNum+=1; //同級結點數目加一
if(n[i].checked)SameNodeCheckedNum+=1; //同級結點被選中的數目加一
if(n[i].indeterminate)SameNodeCheckSome+=1; //同級結點半選數目加一
}
if(n[i].name.substring(0,NodeName.length)==NodeName&&n[i].name!=NodeName&&n[i].type=="checkbox")
{
SubNodeNum+=1; //子結點數數目加一
if(n[i].checked)SubNodeCheckedNum+=1; //子結點被選中的數目加一
if(n[i].indeterminate)SubNodeCheckSome+=1; //子結點半選數目加一
}
}
if((SameNodeNum==1||SameNodeCheckedNum==0)&&(SubNodeCheckedNum==0)&&!document.all(NodeName).checked)
SubNodeCheckedTF=true; //判斷子結點是否被選中
if((SameNodeNum>=0&&SameNodeCheckedNum<SameNodeNum)||SameNodeCheckSome>0||SubNodeCheckSome>0)
document.all(SearchParentNodeName).indeterminate=true;//將上級選中狀態改爲半選
if((SameNodeCheckedNum==SameNodeNum||SameNodeCheckedNum==0)&&SubNodeCheckSome==0&&SameNodeCheckSome==0)
document.all(SearchParentNodeName).indeterminate=false;//取消上級半選狀態
return SearchParentNodeName;
}
function CheckAll(BoxName)
{
SearchNodeName=BoxName;
SearchParentNodeName=BoxName;
SubNodeLength=BoxName.split("_").length;
for(i=0;i<CheckBoxNum;i++)
{
if(n[i].name.substring(0,BoxName.length)==BoxName&&n[i].name!=BoxName&&n[i].type=="checkbox")
{
n[i].indeterminate=false; //取消半選狀態
n[i].checked=document.all(BoxName).checked?true:false;//選中所有子結點
}
}
for(j=1;j<SubNodeLength;j++)
{
document.all(CheckSubNode(SearchParentNodeName)).checked=SubNodeCheckedTF?false:true;//如果有子結點被選中,則選中上級結點,返之取消
}
}
document.οnclick=function(){if(event.srcElement.type=="checkbox")CheckAll(event.srcElement.name);}
</script><body >
<form name="f1" >
<input type="checkbox" name="bid"><br>
<input type="checkbox" name="bid_01"><br>
<input type="checkbox" name="bid_01_01"><br>
<input type="checkbox" name="bid_01_02"><br>
<input type="checkbox" name="bid_01_02_01"><br>
<input type="checkbox" name="bid_01_02_02"><br>
<input type="checkbox" name="bid_01_02_02_01"><br>
<input type="checkbox" name="bid_01_02_02_02"><br>
<input type="checkbox" name="bid_01_02_02_03"><br>
<input type="checkbox" name="bid_01_02_02_03_01"><br>
<input type="checkbox" name="bid_01_02_02_03_02"><br>
<input type="checkbox" name="bid_01_02_02_03_03"><br>
<input type="checkbox" name="bid_01_02_02_04"><br>
<input type="checkbox" name="bid_01_02_03"><br>
<input type="checkbox" name="bid_01_03"><br>
<input type="checkbox" name="bid_01_04"><br>
<input type="checkbox" name="bid_02"><br>
<input type="checkbox" name="bid_03"><br>
<input type="checkbox" name="bid_04"><br>
<hr>
<input type="checkbox" name="ent" checkmain ><br>
<input type="checkbox" name="ent_01"><br>
<input type="checkbox" name="ent_01_01"><br>
<input type="checkbox" name="ent_02"><br>
<input type="checkbox" name="ent_03"><br>
<input type="checkbox" name="ent_04"><br>
</form>