function filterSpam(obj)
{
	var randomStr = generateRandomString();
	var element = document.createElement("input");
	element.setAttribute("type", "hidden");
	element.setAttribute("name", "nospam_" + randomStr);
	element.setAttribute("value", reverse(randomStr));
	obj.appendChild(element);

	return true;
}

function generateRandomString()
{
	var chars = "abcdefghijklmnopqrstuvwxyz";
	var ret = "";
	for(var i = 0; i < 10; i++)
		ret += chars.charAt(Math.round((chars.length - 1) * Math.random()));

	return ret;
}

function reverse(str)
{
	return str.split("").reverse().join("");
}

function generateMailAddress()
{
	var element = document.getElementById("email");
	var txt = "<a href=\"mailto:etunimi.sukunimi@gmail.com\">etunimi.sukunimi@gmail.com</a> ";
	element.innerHTML = txt.replace(/etunimi/g, "tero").replace(/sukunimi/g, "kaija");
}