jQuery validateプラグインの詳細説明

<script type="text/javascript" src="js/jquery-1.9.1.js?1.1.10" ></script>
<script type="text/javascript" src="js/jquery.validate.min.js?1.1.10" ></script>

<script type="text/javascript">
$(function(){
$(&#39;#demoForm&#39;).validate({
rules:{
//指的是input 的 name的名字
username:{
required:true,
minlength:6,
maxlength:9
},
password:{
required:true,
minlength:6,
maxlength:9
},
age:{
min:18,
max:80,
//range:[18,80],
//r                         angelength:[2,3],
digits:true
},
date:{
required:true,
dateISO:true,
}
},
messages:{
username:{
required:&#39;此项必填&#39;,
minlength:&#39;用户名最小是6位&#39;,
maxlength:&#39;用户名最大是9位&#39;
},
password:{
required:&#39;此项必填&#39;,
minlength:&#39;密码最小是6位&#39;,
maxlength:&#39;密码最大是9位&#39;
},
age:{
min:&#39;最小18岁&#39;,
max:&#39;最大80岁&#39;,
//range:&#39;年龄必须是18-80之间&#39;,
//                          rangelength:&#39;2-3位数&#39;,
digits:&#39;年龄必须是正整数&#39;
},
date:{
required:&#39;必填&#39;,
dateISO:&#39;日期格式不合法&#39;
}
}
})
})
</script>

<form id="demoForm">
<p>
<label for="user">username</label>
<input type="text" name="username" id="user"/>
</p>
<p>
<label for="pass">password</label>
<input type="text" name="password" id="pass"/>
</p>
<p>
<label for="age">age</label>
<input type="text" name="age" id="age"/>
</p>
<p>
<label for="date">date</label>
<input type="text" name="date" id="date"/>
</p>
<p>
<input type="submit" value="提交" id="btn"/>
</p>
</form>