function hideshowq() {
		var elq	= document.all['tree_1'];
		var elw	= document.all['tree_2'];
		var ele	= document.all['tree_3'];
		var elr	= document.all['tree_4'];
		elq.style.display = 'block';
		elw.style.display = 'none';
		ele.style.display = 'none';
		elr.style.display = 'none';
}

function hideshoww() {
		var elq	= document.all['tree_1'];
		var elw	= document.all['tree_2'];
		var ele	= document.all['tree_3'];
		var elr	= document.all['tree_4'];
		elw.style.display = 'block';
		elq.style.display = 'none';
		ele.style.display = 'none';
		elr.style.display = 'none';
}

function hideshowe() {
		var elq	= document.all['tree_1'];
		var elw	= document.all['tree_2'];
		var ele	= document.all['tree_3'];
		var elr	= document.all['tree_4'];
		elq.style.display = 'none';
		elw.style.display = 'none';
		ele.style.display = 'block';
		elr.style.display = 'none';
}

function hideshowr() {
		var elq	= document.all['tree_1'];
		var elw	= document.all['tree_2'];
		var ele	= document.all['tree_3'];
		var elr	= document.all['tree_4'];
		elq.style.display = 'none';
		elw.style.display = 'none';
		ele.style.display = 'none';
		elr.style.display = 'block';
}

function hideshowt() {
		var elq	= document.all['tree_1'];
		var elw	= document.all['tree_2'];
		var ele	= document.all['tree_3'];
		var elr	= document.all['tree_4'];
		elq.style.display = 'none';
		elw.style.display = 'none';
		ele.style.display = 'none';
		elr.style.display = 'none';
}



function hideshow(num) {
	if (num == 0) {

	document.all['years_1'].style.display = 'none';
	document.all['years_2'].style.display = 'none';	

	} else {
		var el = document.all['years_' + num];
		if (el.style.display == 'none') {
			el.style.display = 'block';
		} else {
			el.style.display = 'none';
  		}
	}
	
}

function expand(num) {
	if (num == 0) {

	document.all['month_1'].style.display = 'none';
	document.all['month_2'].style.display = 'none';	
	document.all['month_3'].style.display = 'none';	
	document.all['month_4'].style.display = 'none';
	document.all['month_5'].style.display = 'none';	
	document.all['month_6'].style.display = 'none';			

	} else {
		var el = document.all['month_' + num];
		if (el.style.display == 'none') {
			el.style.display = 'block';
		} else {
			el.style.display = 'none';
  		}
	}
	
}