function email_replace()
{
	
	var i;
	var zastupny_retezec = 'x';
	var anchors = document.getElementsByTagName('a');
	var re = new RegExp('^(mailto:.*)\@' + zastupny_retezec + '(.*)$');
	var re2 = new RegExp('^(.*)\@' + zastupny_retezec + '(.*)$');
	
	var obsah, href;
	
	for (i=0; i<anchors.length; i++) {
		//regular
		if (re.test(anchors[i].href))
		{
			//alert(anchors[i].innerHTML);
			obsah = anchors[i].innerHTML.replace(re2,"$1@$2");
			href = anchors[i].href.replace(re,"$1@$2");
						
			anchors[i].href = decodeURI(href);
			anchors[i].innerHTML = obsah;			
		}
	
	
	}
}

email_replace();