ecshop可以在网站头部或者是在首页实现无刷新的ajax登录登出效果，代码如下
只需找到themes/我的模板名称/library/member_info.lbi，将里面的代码用下面的代码替换即可，样式您可以根据自己的网站风格进行调整
<!--{if $user_info}--><div class="lef_tit_bj">会员登陆</div><div class="left_conn_bj"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="50" align="center" valign="middle"><label><strong>Hello {$user_info.username}</strong></label></td> </tr> <tr> <td height="30" align="center" valign="middle"><strong>欢迎光临本店</strong></td> </tr> <tr> <td height="40" align="center" valign="bottom"><label> <a href="user.php?act=logout"> <img src="../images/tuichu.gif"></a> <a href="user.php"> <img src="../images/jinrultan.gif"></a> </label></td> </tr> </table></div></div><!--{else}--><div class="lef_tit_bj">会员登录</div><div class="left_conn_bj"> <form id="ECS_LOGINFORM" name="ECS_LOGINFORM" method="post" action="javascript:signIn()"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="50" align="right" valign="middle">用户名：</td> <td height="50" align="left" valign="middle"><label> <input type="text" name="username" class="yonhu_input" style="height:15px;"/> </label></td> </tr> <tr> <td height="30" align="right" valign="middle"> 密 码：</td> <td height="30" align="left" valign="middle"><input type="password" name="password" class="yonhu_input" style="height:15px;" /></td> </tr> <tr> <td height="40" colspan="2" align="center" valign="bottom"><label> <input type="image" name="imageField" src="images/denglu_bann.jpg" /> <a href="user.php?act=register"><img src="images/zhuce_bann.jpg" border="0" /></a> </label></td> </tr> </table> </form></div></div><!--{/if}--> {literal} <script type="text/javascript">function signIn(){ var frm = document.forms['ECS_LOGINFORM']; if (frm) { var username = frm.elements['username'].value; var password = frm.elements['password'].value; var captcha = ''; if (frm.elements['captcha']) { captcha = frm.elements['captcha'].value; } if (username.length == 0 || password.length == 0) {{/literal} alert("{$lang.empty_username_password}");{literal} return; } else { Ajax.call('user.php?act=signin', 'username=' + username + '&password=' + encodeURIComponent(password) + '&captcha=' + captcha, signinResponse, "POST", "TEXT"); } } else { alert('Template error!'); }}function signinResponse(result){ var userName = document.forms['ECS_LOGINFORM'].elements['username'].value; var mzone = document.getElementById("ECS_MEMBERZONE"); var res = result.parseJSON(); if (res.error > 0) { alert(res.content); if(res.html) { mzone.innerHTML = res.html; document.forms['ECS_LOGINFORM'].elements['username'].value = userName; } } else { if (mzone) { mzone.innerHTML = res.content; evalscript(res.ucdata); //alert(res.ucdata); } else { window.location.reload() } }}</script> {/literal}还需要注意的一点是，如果您的模板已经解决过jquery冲突，引用了jquery.json.js，
那其中
var res = result.parseJSON();
要改成
var res = $.evalJSON(result);