/*
This code is based on a code example from the article "Javascript navigation - cleaner, not meaner" by Christian Heilmann
URL: http://www.evolt.org/article/Javascript_navigation_cleaner_not_meaner/17/60273/index.html
*/

// If there is enough W3C DOM support for all our show/hide behavior:
// 1. Call the stylesheet that by default hides all toggleable sections 
// 2. Apply the show/hide behavior by calling the initialization function
if (document.getElementById && document.getElementsByTagName && document.createTextNode) {
	document.write('<link rel="stylesheet" type="text/css" href="js_hide.css" />');
	window.onload = initShowHide;
}

function initShowHide() {
	// Hide all toggleable sections with JavaScript for the highly improbable case that CSS is disabled
	// Note that in this case the 'flash of visible content' still will occur
	// For testing purposes you can add the following code to disable CSS: document.getElementsByTagName('link')[0].disabled = true;			
//	window.resizeTo(770,450);
	hide('variavel');
//	hide('variavel_radio');
	var escolhevideo = document.getElementById('escolhe_video');
	var escolheradio = document.getElementById('escolhe_radio');
	var escolheimpresso = document.getElementById('escolhe_impresso');
	var as = escolhevideo.getElementsByTagName('a');	
	for (var i = 0; i < as.length; i++) {
		as[i].onmouseover = function() {
			show(this,'variavel');
			return false;
		}
	}
	var as = escolheradio.getElementsByTagName('a');	
	for (var i = 0; i < as.length; i++) {
		as[i].onclick = function() {
			show(this,'variavel');
			return false;
		}
	}
	var as = escolheimpresso.getElementsByTagName('a');	
	for (var i = 0; i < as.length; i++) {
		as[i].onclick = function() {
			show(this,'variavel');
			return false;
		}
	}
}

function show(s,elemento) {
	hide(elemento);
	var id = s.href.match(/#(\w.+)/)[1];
	document.getElementById(id).style.display = 'block';
}

function hide(elemento) {
	var toggleable = document.getElementById(elemento).getElementsByTagName('div');
	for (var i = 0; i < toggleable.length; i++) {
		toggleable[i].style.display = 'none';
	}
}