function hideall (className, commId) {
	var sel = document.getElementsByClassName('sel');
	if (sel != 'undefined') {
		for (i=0;i<sel.length;i++) {
			var el = sel[i].id;
			var tabId = el.split('_');
			if (tabId[1] != commId && tabId[1] != commId) {
				document.getElementById(el).className= "home";
			}
		}
	}
	else {
		alert('undefined');
	}
	
	var hideList = document.getElementsByClassName(className);
	for (i=0;i<hideList.length;i++) {
		var el = hideList[i].id;
		var tabId = el.split('_');
		if (tabId[1] != commId && tabId[1] != commId) {
			document.getElementById(hideList[i].id).style.display= "none";
		}
	}
}

function showcomm (id) {
	var sub = document.getElementById('subject_'+id);
	var msg = document.getElementById('msg_'+id)
	if (sub && msg) {
		sub.style.display = "block";
		msg.style.display = "block";
	}
	
	hideall('comm', id);
}