首先是提交页面：三个表单(form1,form2,form3)
<form name="form1" method="post" action="checklogin.jsp" class="niceform">
<input name="qx" type="hidden" value="3">
<label for="textinput">帐号:</label>
<input type="text" id="textinput" name="uid" size="12" />
<br />
<label for="passwordinput">密码:</label>
<input type="password" id="passwordinput" name="pwd" size="12" />
<br />
<input name="" type="submit" value="提交">
<input type="reset" name="Submit2" value="重置" />
</form>
</div>
<div class=tagContent id=tagContent1>欢迎使用本系统，请先【登陆】或【注册】。
<form name="form2" method="post" action="checklogin.jsp" class="niceform">
<input name="qx" type="hidden" value="2">
<label for="textinput">帐号:</label>
<input type="text"
