function spam()
{
	a_tagek=document.getElementsByTagName('a');
	
	for (i=0; i<a_tagek.length; i++)
	{
		a_tagek[i].href=a_tagek[i].href.replace('[a_kukac_helye]', '@');
    	a_tagek[i].href=a_tagek[i].href.replace('[a_pont_helye]', '.');
	}
}

window.onload=spam