Autodetect new content and load (ajax)

I need someone to create ajax functions to detect from mysql when new content on my blog is created, and then load it dynamicly on the users site without any need to refresh. my current php code : $kake = mysql_query("SELECT * FROM `Poster` WHERE `publisert` = 'ja' ORDER BY id ASC"); while($info = mysql_fetch_object($kake)){ $id = $info->id; ?> <div class="entry"> <br> <h2> <a href="<? echo $adresse;?>?side=read&les=<?echo $id;?>"><? echo $info->tittel;?></a> </h2> <div class="meta"> <ul> <br><br> <div id="dato"> </div> </li> </ul> </div> <div class="content"><p style="text-align: center;"><? echo $info->beskrivelse;?><br><center> <a href="<? echo $adresse;?>?side=read&les=<?echo $id;?>">Les hele innlegget...</a></center> </div> <div class="meta"> <ul> <div id="dato2"> <? echo $info->dato;?> <li> 15:11<li> Postet i: <a href="<? echo $adresse;?>/[login to view URL]"><? echo $info->tema;?></a> <li> <a href="http:/t_bloggen.html#comment"><? $kakeer = mysql_query("SELECT * FROM `kommentarer` WHERE `innleggid` = '$id' ORDER BY id ASC"); $kommentarer = mysql_num_rows($kakeer); echo $kommentarer;?> kommentarer</a> </li> </ul> <br><br> </li> </ul> </div> </div> <? } } ?>