function setEm()
{
	if (!document.getElementsByTagName) { return; }
	ar_spans = document.getElementsByTagName('span');
	for (i=0; i<ar_spans.length; i++)
	{
		if (ar_spans[i].className == 'em')
		{
			ex = ar_spans[i].firstChild.nodeValue.split(',');
			tmp = document.createElement('a');
			tmp.href = 'ma'+'i'+'lto:' + ex[1] + '@' + ex[0];
			tmp.appendChild(document.createTextNode(ex[2] ? ex[2] : ex[1] + '@' + ex[0]));
			ar_spans[i].replaceChild(tmp, ar_spans[i].firstChild);
		}
	}
}