function showTab(num)
{
	var spans = document.getElementById('meetingTab').getElementsByTagName('span');
	for(i=0;i<spans.length;i++)
	{
		spans[i].className = '';
		document.getElementById('regular'+(i+1)).style.display = 'none';
	}
	document.getElementById('span'+num).className = 'active';
	document.getElementById('regular'+num).style.display = '';
}