thinkphp I() 方法

<form id="complai_form" method="post" action="{:U(‘Index/Complai‘)}">
<div class="com_area">
<div style="width:80%;height:50px;margin:0 auto;">
<div class="ser_mbx">我要投诉</div>
</div>
<textarea rows="10" cols="80" class="com_text" name="yang" maxlength="500" style="width:80%;">
</textarea>
<div style="width:90%;height:20px;text-align:right;">
<span style="font-size:12px;color:gray;">内容字数小于500字</span>
</div>
<div class="com_tbox">
<input type="submit" id="subn" value="提交" />
</div>
</div>
</form>