任务3实现不了为什么
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<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");
var i=0;
while(hobby[i]!=null)
{
hobby[i].checked=true;
i++;
}
// 任务1
}
function clearall(){
var hobby = document.getElementsByName("hobby");
var i=0;
while(hobby[i]!=null){
hobby[i].checked=false;
i++;
}
// 任务2
}
function checkone(){
var j=document.getElementById("wb").value;
var jSplit=j.split("");
var i=0;
while(jSplit[i]!=null){
hobby[parseInt(jSplit[i])].checked=true;
i++;
}
// 任务3
}
</script>
</body>
</html>
慕粉43924111回答
-
stone310
checkone()里面增加hobby定义var hobby = document.getElementsByName("hobby");另外这里要parseInt(jSplit[i])-1才能按照1-6进行选择while(jSplit[i]!=null){ hobby[parseInt(jSplit[i])-1].checked=true;
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相关分类
JavaScript