23行结尾少个分号,为什么程序也能正确运行,检测用户名和邮箱都正确
张看 2015-03-03 11:42:49 var patt=/^\w+@\w+(\.\w+)+$/ 这一行后面少个分号,为什么程序也能正确运行
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN">
<head>
<title>新建网页</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="description" content="" />
</head>
<body>
<form action="">
<p>yonghu:<input type="text" name="username" /></p>
<p>youxiang:<input type="text" name="email" /></p>
<p><input type="submit" value="提交" /></p>
</form>
</body>
<script>
document.getElementsByTagName('form')[0].onsubmit=function(){
var patt=/^[a-zA-Z0-9]{6,11}$/;
if(!patt.test(document.getElementsByName('username')[0].value)){
alert('用户名由6到11位数字或字母组成');
return false;
}
var patt=/^\w+@\w+(\.\w+)+$/
if(!patt.test(document.getElementsByName('email')[0].value)){
alert('请输入正确的E-mail');
return false;
}
}
</script>
</html>