<form action="abc.php" enctype="multipart/form-data" method="post" id="info" name="form1">
<ul>
<li><span>姓名:</span><input type="text" id="name" name="name" class="required" /></li>
<li><span>手机:</span><input type="text" id="tel" name="tel" class="required" /></li>
<li><span>邮箱:</span><input type="text" id="email" name="emain" class="required" /></li>
<li class="btn"><input type="image" src="images/1.png" id="btn" /></li>
</ul>
</form>
<ul>
<li><span>姓名:</span><input type="text" id="name" name="name" class="required" /></li>
<li><span>手机:</span><input type="text" id="tel" name="tel" class="required" /></li>
<li><span>邮箱:</span><input type="text" id="email" name="emain" class="required" /></li>
<li class="btn"><input type="image" src="images/1.png" id="btn" /></li>
</ul>
</form>
手机:/1[358]\d{9}/g
邮箱:/\w+(.\w+)*@\w+(.\w+)+/g用户名有啥要求?你把各种你能想到的情况都列出来。