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;
}


var zIndex = 1;

var lastActive = null;

function setImageActive(year) {
	document.getElementById('y' + year).style.zIndex = zIndex;
	zIndex++
	
	document.getElementById('t' + year).style.color = '#990000';
	if(lastActive != null)
		document.getElementById('t' + lastActive).style.color = '#464646';
	lastActive = year;
}


function $(id) {
	return document.getElementById(id);
}