_uWnd.alert($('#reklamaWebo4kaRu').html(),'Реклама',{w: 300,h: 150,tm:10000,icon:'http://s39.ucoz.net/img/ma/mon.png'});

<div id="greeting">
<div id="body_pop">
<div id="close_b" onclick="function{setcookie('greeting','1',24*60*60*1000)}"></div>
<div id="title_pop">ТЕКСТ1</div>
<div id="text_pop">ТЕКСТ2</div>
</div>
</div>

<script type="text/javascript">
value = getcookie('greeting'); if(value == '1') {
$("#greeting").css({"display":"none"})
} else {
$("#greeting").css({"display":"block"})
}
</script>

<div id="greeting">
<div id="body_pop">
<div id="close_b" onclick="greeting.style.display='none';Cookie('greeting', 1);"></div>
<div id="title_pop">Заголовок</div>
<div id="text_pop">Текст</div>
</div>
</div>

<script type="text/javascript">
function setCookie(name, value, days) {
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
var expires = "; expires=" + date.toGMTString();
}
else var expires = "";
document.cookie = name + "=" + value + expires + "; path=/";
}
function getCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') c = c.substring(1, c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
}
return null;
}

function eraseCookie(name)
{
setCookie(name, "", -1);
}

function Cookie(name, days) // функция
{
if (!getCookie(name)) // если нет куки name
{
setCookie(name, true, days); // записать такую куку
greeting.style.display='block'; // плюс спрятать блок
} else {greeting.style.display='none';} // если есть то просто прятать
}

</script>

<div id="greeting" style="display:none;">
<div id="body_pop">
<div id="close_b" onclick="function{setcookie('greeting','1',24*60*60*1000)}"></div>
<div id="title_pop">ТЕКСТ1</div>
<div id="text_pop">ТЕКСТ2</div>
</div>
</div>

<script>
function eraseCookie(name)
{
setCookie(name, "", -1);
}

function Cookie(name, days)
{
if (!getCookie(name))
{
setCookie(name, true, days); $('#greeting').show();}
}

Cookie('uWnd', 1);
</script>

<div id="greeting" style="display:none;">
<div id="body_pop">
<div id="close_b" onclick="javascript:close_b()"></div>
<div id="title_pop">Заголовок</div>
<div id="text_pop">Текст</div>
</div>
</div>

<script type="text/javascript">
function setCookie(name, value, days) {
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
var expires = "; expires=" + date.toGMTString();
}
else var expires = "";
document.cookie = name + "=" + value + expires + "; path=/";
}
function getCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') c = c.substring(1, c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
}
return null;
}

function eraseCookie(name)
{
setCookie(name, "", -1);
}

function Cookie(name, days)
{
if (!getCookie(name))
{
setCookie(name, true, days); $('#greeting').show();}
}

function close_b (){
greeting.style.display='none';
setcookie('greeting','1',24*60*60*1000);
}

Cookie('greeting', 1);
</script>