算法大佬们看看还有什么更好的写法没?
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf8">
<title>无标题文档</title>
</head>
<body>
<form>
请选择你爱好:<br>
<input type="checkbox" name="hobby" id="hobby1"> 音乐
<input type="checkbox" name="hobby" id="hobby2"> 登山
<input type="checkbox" name="hobby" id="hobby3"> 游泳
<input type="checkbox" name="hobby" id="hobby4"> 阅读
<input type="checkbox" name="hobby" id="hobby5"> 打球
<input type="checkbox" name="hobby" id="hobby6"> 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">
function checkall(){
var hobby = document.getElementsByTagName("input");
for(var i=0;i<hobby.length;i++){
if(hobby[i].type=="checkbox"){
hobby[i].checked=true;
}
}
}// 任务1
function clearall(){
var hobby = document.getElementsByName("hobby");
for (i=0;i<hobby.length;i++) {
if (hobby[i].type=="checkbox") {
hobby[i].checked=false;
}
}
// 任务2
}
function checkone(){
var j=document.getElementById("wb").value;
var hobby = document.getElementsByName("hobby");
switch(j){
case "1":hobby[0].checked=true;break;
case "2":hobby[1].checked=true;break;
case "3":hobby[2].checked=true;break;
case "4":hobby[3].checked=true;break;
case "5":hobby[4].checked=true;break;
case "6":hobby[5].checked=true;break;
} // 任务3
}
</script>
</body>
</html>