function changeimg(name, src){
	var doc = document.images[name]

	switch (src) {
		case '' :
			break;
		default :
			doc.src = src;
	}
}

function changetreebutton(item, src){

	item.src = src;

}

function openurl(self)
{
	document.location.href = self.children(0).href;	
}