var W3CDOM = (document.createElement && document.getElementsByTagName);
var mouseOvers = new Array();
var mouseOuts = new Array();

window.onload = init;

function init(){
	if (!W3CDOM) return;
	var nav = document.getElementById('mouseovers');
	var imgs = nav.getElementsByTagName('img');
	for (var i=0;i<imgs.length;i++)	{
		imgs[i].onmouseover = mouseGoesOver;
		imgs[i].onmouseout = mouseGoesOut;
		var suffix = imgs[i].src.substring(imgs[i].src.lastIndexOf('.'));
		mouseOuts[i] = new Image();
		mouseOuts[i].src = imgs[i].src;
		mouseOvers[i] = new Image();
		mouseOvers[i].src = imgs[i].src.substring(0,imgs[i].src.lastIndexOf('.')) + "_over" + suffix;
		imgs[i].number = i;
	}
}
function mouseGoesOver(){
	this.src = mouseOvers[this.number].src;
}
function mouseGoesOut(){
	this.src = mouseOuts[this.number].src;
}
function mostrar(link, table){
 var w = document.getElementById(table);
 var sinal = document.getElementById(link);

  if (sinal.innerHTML == '[+] informações'){
	  document.getElementById(link).innerHTML = '[-]';
    w.style.display = 'block';
	}
  else{ 
	  document.getElementById(link).innerHTML = '[+] informações';
    w.style.display = 'none';
  }
}