html5+JavaScript进行邮箱地址验证

<!doctype html>
<html>
<head>
<meta charset=utf-8 />
<title>html5 网页特效 邮箱地址验证</title>
<style>
body, input, textarea {
  font-family: "helvetica", arial, helvetica;
}
label {
  display: block;
  float: left;
  clear: left;
  text-align: right;
  width: 100px;
  margin-right: 10px;
}
p { padding: 10px; }
fieldset { border: 1px solid #ccc; margin-bottom: 20px; }
</style>
</head>
<body>
<form>
  <fieldset>
    <legend>some bits about you</legend>
    <p><label for="email">email:</label> <input id="email" name="email" type="email" /></p>
    <p><label for="url">homepage:</label><input id="url" type="url" name="url" required /></p> 
    <p><textarea name="comment" cols="100" rows="5" required></textarea></p>
  </fieldset>
  <input type="submit" />
</form>
<script>
// default validation messages
var messages = {
  email: 'be not a legal email address',
  url: 'be not a valid web address',
  comment: 'ye have to specify ye value'
};
var forms = document.getelementsbytagname('form'), i = forms.length, j, el;
while (i--) {
  j = forms[i].length;
  while (j--, el = forms[i][j]) {
    if (el.willvalidate && messages[el.name]) {
      el.setcustomvalidity(messages[el.name]);
    }
  }
}
</script>
<script>
var form = document.getelementsbytagname('form')[0];
form.onsubmit = function (event) {
  var i = this.length, el, cont = true, errors = [];
  while (i--, el = this[i]) {
    if (el.willvalidate) {
      if (!el.validity.valid) {
        errors.push('error with ' + el.name + (el.validationmessage ? ': ' + el.validationmessage: ''));
        cont = false;
      }
    }
  }
  
  if (errors.length) {
    // replace alert with your sexy css教程 info bubbles
    alert(errors.join('n'));
  }
  return cont;
};
</script>
</body>
</html>

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