啥也看不清
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<form>
请选择你爱好:<br>
<input type="checkbox" name="hobby" id="hobby1" value="1">音乐
<input type="checkbox" name="hobby" id="hobby2" value="2">登山
<input type="checkbox" name="hobby" id="hobby3" value="3">游泳
<input type="checkbox" name="hobby" id="hobby4" value="4">阅读
<input type="checkbox" name="hobby" id="hobby5" value="5">打球
<input type="checkbox" name="hobby" id="hobby6" value="6">跑步 <br>
<input type="button" value = "全选" onclick = "checkall();">
<input type="button" value = "全不选" onclick = "clearall();">
<p>请输入您要选择爱好的序号，序号为1-6:</p>
<input id="wb" name="wb" type="text" >
<input name="ok" type="button" value="确定" onclick = "checkone();">
</form>
<script type="text/javascript">
var hobby = document.getElementsByName("hobby");
function checkall(){
for(var i=0;i<hobby.length;i++){
hobby[i].checked = true;
}
}
function clearall(){
for(var i=0;i<hobby.length;i++){
hobby[i].checked = false;
}
}
function checkone(){
var txtVal = document.getElementById("wb").value;
for(var i=0;i<hobby.length;i++){
if(hobby[i].value == txtVal){
hobby[i].checked = true;
}
}
// 任务3
}
</script>
</body>
</html>