红线收藏

<input type="checkbox" id="zhz" onclick="Btn_click()" />1<br/>
<input type="checkbox" id="zhz" onclick="Btn_click()" />2<br/>
<input type="checkbox" id="zhz" onclick="Btn_click()" />3<br/>
<input type="checkbox" id="zhz" onclick="Btn_click()" />4<br/>
<input type="checkbox" id="zhz" onclick="Btn_click()" />5<br/>
<input type="checkbox" id="CheckAll" onclick="CheckAll()" />Check/UnCheck All
<SCRIPT LANGUAGE="javascript">
<!--
function CheckAll(){
for(i = 0; i < document.all.zhz.length; i++){
document.all.zhz[i].checked = document.all.CheckAll.checked;
}
}
function Btn_click(){
len = document.all.zhz.length;
intnum=0
for(i = 0; i < len; i++){
if(document.all.zhz[i].checked) intnum++;
}
if(len == intnum) document.all.CheckAll.checked = true;
else document.all.CheckAll.checked = false;
}
//-->
</SCRIPT>