請(qǐng)問這段代碼為什么不能運(yùn)行呢？謝謝啦
<!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(qǐng)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(qǐng)輸入您要選擇愛好的序號(hào)，序號(hào)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(var i=0,i<hobby.length,i++){
?????????? hobby[i].checked=true;
??????? }
}
??????? function clearall(){
??????? var hobby = document.getElementsByName("hobby");
??????? for(var i=0,i<hobby.length,i++){
??????? hobby[i].checked=false; ?
??????? } ?
}
?????? ?
??????? function checkone(){
????????? var j=document.getElementById("wb").value;
??????? var hobby=document.getElementsByName("hobby");
??????? //j<1或j>6
??????? if(parseInt(j)<1||parseInt(j)>6){
???????????? alert("請(qǐng)輸入1--6之間的整數(shù)");
???????? }
??????? else{
??????? hobby[parseInt(j)-1].checked = true;
??????? }
?????? ?
??????? }
??????? </script>
??? </body>
</html>
2016-07-31
for循環(huán)逗號(hào)換成分號(hào)，checkone()方法里var hobby=document.getElementsByName("hobby"); 這一句定義錯(cuò)了，應(yīng)該是var hobby = document.getElementsByTagName("input");