function current(elemId, obj)
{
	var ul = obj.parentNode.parentNode;
	for (var i=0; i<ul.childNodes.length;i++) {
	    if (ul.childNodes[i].nodeType == 1) {
	        ul.childNodes[i].className = 'li';
	    }
	}
	obj.parentNode.className = 'li-a';
	
 	var container = document.getElementsByTagName('div');
	for (var i=0; i<container.length;i++) {
	    if (container[i].className == 'content') {
	        container[i].style.display = 'none';
	    }
	}
	document.getElementById(elemId).style.display = 'block';
}