function kukac() {
    var fromto = { "-kukacc-" : "@", "-ppont-" : ".", "-att-" : "@", "-ddot-" : "." };
	
	var links = document.getElementsByTagName("a");
	var i;
	for (i=0; i<links.length; i++) {
		// >
		var a = links[i];
		if (a.href.toLowerCase().substring(0, 7) == "mailto:") {
			for (from in fromto) {
				a.href = a.href.replace(from, fromto[from]);
				a.innerHTML = a.innerHTML.replace(from, fromto[from]);
			}
		}
	}
	
}

if (window.addEventListener) {
    // others
    window.addEventListener("load", kukac, false);
} else {
    // ie
    window.attachEvent("onload", kukac);
}