輸入序號值并不能使函數(shù)調(diào)用，運行結(jié)果都是default后面的alert語句
完整代碼是：
<!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");
????????? ?
????????? // 任務(wù)1
????????? for(var i=0;i<hobby.length;i++){
?????????? hobby[i].checked=true;}
??????? }
??????? function clearall(){
??????????? var hobby = document.getElementsByName("hobby");
?????????? ?
???????? // 任務(wù)2?? ?
????????? 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");
??????? switch(j){
??????????? case 1:
??????????????? hobby[0].checked=true;
??????????????? break;
??????????? case 2:
??????????????? hobby[1].checked=true;
??????????????? break;
??????????? case 3:
??????????????? hobby[2].checked=true;
??????????? case 4:
??????????????? hobby[3].checked=true;
??????????????? break;
??????????? case 5:
??????????????? hobby[4].checked=true;
??????????????? break;
??????????? case 6:
??????????????? hobby[5].checked=true;
??????????????? break;
??????????? default:
??????????? alert("請輸入1——6整數(shù)");
??????? }
???????? // 任務(wù)3
?????? ?
??????? }
?????? ?
??????? </script>
??? </body>
</html>
2015-11-29
var?j?=?parseInt(document.getElementById("wb").value);把取出來的值轉(zhuǎn)一下數(shù)字，不然的話他會認(rèn)為你給的值都是字符串，然后你和數(shù)字比較，肯定都不相等了，所以就一直跳到最后了。
2015-11-29
他報錯 的錯誤代碼是什么