function changeExpand(id){
		var element = document.getElementById(id);
		if (element.style.display == 'none'){
			element.style.display = 'block';
		} else {
			element.style.display = 'none';
		}
	}
	
	function changeClass(id, expandTimeClass, collapseTimeClass){
		var element = document.getElementById(id);
		if (element.attributes['class'].value == expandTimeClass){
			element.attributes['class'].value = collapseTimeClass;
		} else {
			element.attributes['class'].value = expandTimeClass;
		}
	}