checkbox全选/不选的js代码实现
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>复选框全选与不全选的切换</title>
</head>
<body>
<input type=checkbox name=mm value=a ><br>
<input type=checkbox name=mm value=b ><br>
<input type=checkbox name=mm value=c ><br>
<input type=checkbox name=mm value=d ><br>
<input type=checkbox name=mm value=e ><br><br>
<input type=checkbox name=mmAll >全选与不全选的切换
<script language=Javascript>
function checkAll(e, itemName)
{
var aa = document.getElementsByName(itemName);
for (var i=0; i<aa.length; i++)
aa.checked = e.checked;
}
function checkItem(e, allName)
{
var all = document.getElementsByName(allName);
if(!e.checked) all.checked = false;
else
{
var aa = document.getElementsByName(e.name);
for (var i=0; i<aa.length; i++)
if(!aa.checked) return;
all.checked = true;
}
}
</script>
</body>
</html>
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