</head>

На что заменить:  

[code]<script type="text/javascript" src="/js/signUp.js"></script>     
</head>

</head>   

<script type="text/javascript" src="/js/jquery.js"></script>     
<script type="text/javascript" src="/js/signUp.js"></script>     
</head>

<?if(!$USER_LOGGED_IN$)?><a href="#" title="Войти на сайт" onclick="return popUp();"><font size=3><b>Войти на сайт</font></b><br><a href="$REGISTER_LINK$">Регистрация<br><a href="javascript://" onclick="_dontOnTop=1;openLayerB('Prm',0,'/index/5','Напоминание пароля',250,130,1);return false;">Забыл пароль</a>     
<tr>     
<td height="0" align="left" valign="top">     
<div id="signUpBlock">     
<div id="darkBack"></div>     
<div id="hiddenBlock">     
<div id="signUpForm">     
<a class="closeWindow" href="#" title="" onclick="return closePopUp();"></a>     
<form method="POST" name="loginform" action="/index/">     
<br>     
<br>     
<br>     
<br>     
<br>     
<br>     
<br>     
<b><div class="lgmtitle"> Логин: <input type="text" name="user" class="lgn" >     
<div style="padding:4px"></div>     
<b>Пароль:<input type="password" name="password" id="password" class="lgn" />     
<div style="padding:4px"></div></fotn>     

<div align="center"><button id="but" type="submit" value="войти" class="butt" />Войти</button>     
<div style="padding:4px"></div>     
<input name="login" type="hidden" id="login" value="submit" />     
<input type="hidden" name="a" value="2"><input type="hidden" name="redirect" value="0">     
</td></tr></form>     
</tr>     
<tr><td bgcolor="#E9ECF5"><img border="0" src="http://src.ucoz.net/t/121/11.gif" width="190" height="21">     
<script type="text/javascript">document.loginform.redirect.value=window.location.href;</script> </td></tr>     
</table>     
<div style="padding:3px"></div><?endif?>