UC知道急~~~~ 急~~~~~ 急~~~~~
来源：百度知道 编辑：UC知道 时间：2024/06/28 03:56:40
<html>
<head>
<title>DanXuan</title>
<script language="javascript">
function dx(){
j=0;
for(i=0;i<document.bb.aa.length;i++)
{if(document.bb.aa[i].checked==true){
j++;}
}
if(j==0)
{alert("你还没选择呐！");
return false;
}
return true;
}
</script>
</head>
<body>
<form name"bb" method="post" action="" onSubmit="return dx()">
<p>性别</p>
<p>男
<input type="radio" name="aa" value="" />
女
<input type="radio" name="aa" value="" />
</p>
<input type="submit" value="提交" name="B1" />
</form>
</body>
</html>
<head>
<title>DanXuan</title>
<script language="javascript">
function dx(){
j=0;
for(i=0;i<document.bb.aa.length;i++)
{if(document.bb.aa[i].checked==true){
j++;}
}
if(j==0)
{alert("你还没选择呐！");
return false;
}
return true;
}
</script>
</head>
<body>
<form name"bb" method="post" action="" onSubmit="return dx()">
<p>性别</p>
<p>男
<input type="radio" name="aa" value="" />
女
<input type="radio" name="aa" value="" />
</p>
<input type="submit" value="提交" name="B1" />
</form>
</body>
</html>
帮你修改了下.
代码:
<html>
<head>
<title>DanXuan</title>
<script language="javascript">
function dx(){
j=0;
for(i=0;i<document.bb.aa.length;i++)
{if(document.bb.aa[i].checked==true){
j++;}
}
if(j==0){
alert("你还没选择呐！");
return false;
}
return true;
}
</script>
</head>
<body>
<form name="bb" id="bb" method="post" action="" onSubmit="return dx()">
<p>性别</p>
<p>男
<input type="radio" name="aa" value="" />
女
<input type="radio" name="aa" value="" />
</p>
<input type="submit" value="提交" name="B1" />
</form>
</body>
</html>