function treeClick(self) {
	var div = document.getElementById('g' + self.id);
	var img = document.getElementById('i' + self.id);
	var img_path = img.src;
	var img_suffix=explode("/",img_path);
	var img_name =img_suffix[img_suffix.length-1];
	img_suffix=img_suffix[img_suffix.length-1].length;
	var img_prefix=img_path.length-img_suffix;
	img_path = img_path.substr(0,img_prefix);
	if (img_name == 'tree2.gif') {
		img.src = img_path + 'tree3.gif';
		div.style.display = 'none'
	}
	if (img_name == 'tree3.gif') {
		img.src = img_path + 'tree2.gif';
		div.style.display = ''
	}
}

function treeItemClick(self) {
	var cb = document.getElementById('c' + self.id);
	cb.click();
}