verovatno pravi problem </script> unutar document.write, pa browser misli da se tu zatvara prvi script tag, zato probaj ovako:
Kôd:
<div id="wx_module_2599">
<a href="http://www.weather.com/weather/local/YIXX0024">Kopaonik, Serbia And Montenegro Weather</a>
</div>
<script type="text/javascript">
<!--
var wx_locID = 'YIXX0024';
var wx_targetDiv = 'wx_module_2599';
var wx_config='SZ=300x250*WX=HVW*LNK=SSNL*UNT=C*BGI=snow*MAP=eur|null*DN=villarunolist.com*TIER=0*PID=1015149567*MD5=9dc8db3a5073e03fd4cd411796d9f0bc';
document.write('<script src="'+document.location.protocol+'//wow.weather.com/weather/wow/module/'+wx_locID+'?config='+wx_config+'&proto='+document.location.protocol+'&target='+wx_targetDiv+'"></s'+'cript>');
// -->
</script>