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誰能告訴我哪里錯了啊？謝謝

<!DOCTYPE HTML>
<html>
??? <head>
??????? <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
??????? <title>無標(biāo)題文檔</title>
??? </head>
???
??? <body>
??????? <form>
????????? 請選擇你愛好:<br>
????????? <input type="checkbox" name="hobby" id="hobby1">? 音樂
????????? <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">? 閱讀
????????? <input type="checkbox" name="hobby" id="hobby5">? 打球
????????? <input type="checkbox" name="hobby" id="hobby6">? 跑步 <br>
????????? <input type="button" value = "全選" onclick = "checkall();">
????????? <input type="button" value = "全不選" onclick = "clearall();">
????????? <p>請輸入您要選擇愛好的序號，序號為1-6:</p>
????????? <input id="wb" name="wb" type="text" >
????????? <input name="ok" type="button" value="確定" onclick = "checkone();">
??????? </form>
??????? <script type="text/javascript">
??????? function checkall(){
??????????? var hobby = document.getElementsByTagName("input");
??????????? for(i=0;i<hobby.length;i++){
??????????????? if(hobby[i].type=="checkbox"){
??????????????????? hobby[i].checked=true;
??????????????? }
??????????? }
??????????
????????? // 任務(wù)1
??????????
??????? }
??????? function clearall(){
??????????? var hobby = document.getElementsByName("hobby");
??????????? for(i=0;i<hobby.length;i++){
??????????????? hobby[i].checked=false;
??????????? }
???????
??????????? }
???????? // 任務(wù)2???
???????????
??????? }
???????
??????? function checkone(){
??????????? var j=document.getElementById("wb").value;
??????????? var hobby=document.getElementById("hobby"+j);
??????????? hobby.checked=true;
???????
??????? }
???????
??????? </script>
??? </body>
</html>

海賊12345

2015-07-21

源自：JavaScript進階篇 9-4

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2 回答

淺水了
2015-07-21

function?checkall(){
????????????var?hobby?=?document.getElementsByTagName("input");
????????????for(i=0;i<hobby.length;i++){
????????????????if(hobby[i].type=="checkbox"){//把if判斷去掉。
????????????????????hobby[i].checked=true;
????????????????}
????????????}
????????????
??????????????//?任務(wù)1?
???????????
????????}//這里多了一個大括號