Делаем красивое popup окно

<!-- BEGIN switch_login_popup -->
<div id="login_popup" class="module main">
<div id="login_popup_title" class="main-head">
<div class="h3">{SITENAME}</div>
</div>
<div class="main-content">
{LOGIN_POPUP_MSG}
<div id="login_popup_buttons">
<form action="{S_LOGIN_ACTION}" method="get">
<input type="submit" class="button2" value="{L_LOGIN}" />
<input type="button" class="button2" value="{L_REGISTER}" onclick="parent.location='{U_REGISTER}';" />
<input id="login_popup_close" type="button" class="button2" value="{L_DONT_DISPLAY_AGAIN}" />
</form>
</div>
</div>
</div>
<!-- END switch_login_popup -->