Hier hab ich mal ein Vote Popup, um es zu benutzen fügt
einfach den unterstehenden Code auf eure Startseite hinzu.

In Antwort auf:

---

<div id="vote-popup-background" style="position:absolute; left:0px; top:0px; width:100%; height:100%; background:#000000; z-index:1000; filter:alpha(opacity=50); opacity:0.5;"></div>
<div id="vote-popup-box" style="position:absolute; left:0px; top:0px; width:100%; background:#000000; color:#FFFFFF; text-align:center; z-index:1001;">
<a id="vote-popup-link" href="javascript:goVote();"><img id="vote-popup-image" style="border:#FFFFFF solid 1px; margin:2px 0px 2px 0px;" /></a><br />
<a id="vote-popup-remind" href="javascript:remindMe();" style="color:#FFFFFF; text-decoration:none;">Klick auf das Bild um zu Voten! [x]schließen?</a>
</div><div style="height:100%px;"></div>
<script type="text/javascript">
var VOTE_IMAGE = "HIER EIN VOTE PIC";
var VOTE_URL = "HIER EURE VOTE URL";

function remindMe()
{
document.getElementById("vote-popup-background").style.visibility = "hidden";
document.getElementById("vote-popup-box").style.visibility = "hidden";
var d = new Date();
d.setTime(d.getTime()+(1000*60*10));
document.cookie = "voteCookie=1; expires="+d.toGMTString();
}

function goVote()
{
var d = new Date();
d.setTime(d.getTime()+(1000*60*60*12));
document.cookie = "voteCookie=1; expires="+d.toGMTString();
window.location = VOTE_URL;
}

function popUpPopUp()
{
var isset = false;
var c_name = "voteCookie";
if (document.cookie.length>0)
{
var c_start=document.cookie.indexOf(c_name + "=");
if (c_start!=-1)
{
isset = true
}
}
if(isset)
{
document.getElementById("vote-popup-background").style.visibility = "hidden";
document.getElementById("vote-popup-box").style.visibility = "hidden";
}
document.getElementById("vote-popup-image").src = VOTE_IMAGE;
}

window.onscroll = function()
{
document.getElementById("vote-popup-box").style.top = (document.body.scrollTop+(document.body.clientHeight/2)-document.getElementById("vote-popup-box").clientHeight)+"px";
document.getElementById("vote-popup-box").style.width = document.body.scrollWidth+"px";
document.getElementById("vote-popup-background").style.height = document.body.scrollHeight+"px";
document.getElementById("vote-popup-background").style.width = document.body.scrollWidth+"px";
}
window.onscroll();
popUpPopUp();
</script>

---