function timeDesc(date) {
	var myEls = getElementsByClass('hider');
	for ( i=0;i<myEls.length;i++ ) {
		myEls[i].style.display = 'none';
	}
	document.getElementById('t'+date).style.display = 'block';
}

function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\\\s)"+searchClass+"(\\\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}