abstract：<!DOCTYPE html><html><head> <meta charset=utf-8" /> <title>test</title> </head><body>
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8" />
<title>test</title>
</head>
<body>
<div>
看书：<input type="checkbox" name="checkbox" value=1><br>
写字：<input type="checkbox" name="checkbox"value=2><br>
打飞机：<input type="checkbox" name="checkbox"value=3><br>
玩游戏：<input type="checkbox" name="checkbox"value=4><br>
<button onclick="checkboxed('checkbox')">全选</button>
<button onclick="uncheckboxed('checkbox')">取消全选</button>
</div>
<script type="text/javascript">
function checkboxed(objName){
var objNameList=document.getElementsByName(objName);
if(null!=objNameList){
alert("全选操作");
for(var i=0;i<objNameList.length;i++){
objNameList[i].checked="checked";
}
}
}
function uncheckboxed(objName){
var objNameList=document.getElementsByName(objName);
if(null!=objNameList){
alert("取消全选操作");
for(var i=0;i<objNameList.length;i++){
objNameList[i].checked="";
}
}
}
</script>
</body>
</html>
Correcting teacher：查无此人Correction time：2018-11-25 11:49:00
Teacher's summary：代码写的不错，逻辑很清晰。飞机还是别打了，好好学习少年。