// JavaScript Document

function show_branches() {
	if(document.getElementById('Layer1')){
	document.getElementById('Layer1').style.visibility = 'visible';
	}
}

function show_addr() {
	
	if(document.getElementById('Layer2')){
		document.getElementById('Layer2').style.visibility = 'visible';
	}
}

function clr_all() {

	if(document.getElementById('Layer1')){
		document.getElementById('Layer1').style.visibility = 'hidden';
	}
}


function clr_all1() {
	if(document.getElementById('Layer2')){
		document.getElementById('Layer2').style.visibility = 'hidden';
	}
}