比较好用的验证插件
<!DOCTYPE html>
<html lang='en' xml:lang='en' xmlns='http://www.w3.org/1999/xhtml'>
<head>
<title></title>
<meta content='text/html;charset=UTF-8' http-equiv='Content-Type' />
<script src="jquery.js" type="text/javascript"></script>
<script src="vanadium.js" type="text/javascript"></script>
</head>
<body>
<form method="get" action="submit_example_form.html">
<fieldset>
<legend>Example of form validation</legend>
<p>Presence <input class=":required" type="text"></p>
<p>Format <input class=":format;/^(vanadium)+$/i" type="text"></p>
<p>Ajax - using server-side to do the job! <input id="pass" class=":ajax;/username_checker/check.json" type="text"></p>
<p>Integer <input class=":integer" type="text"></p>
<p>Float <input class=":float" type="text"></p>
<p>Length <input class=":length;4" type="text"></p>
<p>Longer than or equal to a minimum length <input class=":min_length;4" type="text"></p>
<p>Shorter than or equal to a maximum length <input class=":max_length;4" type="text"></p>
<p>Within a range of lengths <input class=":min_length;4 :max_length;8" type="text"></p>
<p>Acceptance <input class=":accept" type="checkbox"></p>
<p>Confirmation <input id="pass" class=":required" type="password"></p>
<p> <input class=":same_as;pass" type="password"></p>
<p>Email address <input id="pass" class=":email" type="text"></p>
<p>When losing focus. <input class=":required :only_on_blur" type="text"></p>
<p>Delayed validation. <input class=":required :wait;1500" type="text"></p>
<p>When submitting the form. <input class=":required :only_on_submit" type="text"></p>
<p>Immediate validation (default one). <input class=":required" type="text"></p>
<p>select <select name="select-marca" class=":required">
<option selected="selected" value="">- Seleccionar -</option>
<option value="ALFA ROMEO">ALFA ROMEO</option>
<option value="ARO">ARO</option>
<option value="ASIA">ASIA</option>
</select></p>
<p></p>
<p></p>
<p><label for="email">Email (required):</label><input style="width: 200px" type="text" class=":email :required"/></p>
<p><label for="accept">Acceptance (required):</label><input type="checkbox" class="checkbox :accept"/></p>
<p><label for="desc">Presence (required):</label><textarea style="width: 200px" cols="10" rows="2" class="shallow :required"></textarea></p>
<p><input type="submit" value="Test me!" class="submit"/></p>
</fieldset>
</form>
</body>
</html>
valid_class: 'rightformcss',//验证正确时表单样式
invalid_class: 'failformcss',//验证失败时该表单样式
message_value_class: 'msgvaluecss',//这个样式是弹出信息中调用值的样式
advice_class: 'failmsg',//验证失败时文字信息的样式
