var prev;

function emali(state) {
	var linknumber = 0;
	if (state == "a") {
		prev = document.links[linknumber].href;
		document.links[linknumber].href = "mailto:" +prev.substring(prev.indexOf("#") + 1, prev.indexOf("katti")) + "@" + prev.substring(prev.indexOf("katti") + 5);
	} else {
		prev = document.links[linknumber].href;
		document.links[linknumber].href = "#" +prev.substring(7, prev.indexOf("@")) + "katti" + prev.substring(prev.indexOf("@") + 1);
	}
}