var sigla = "";
function clearLi(){		
	var li = document.getElementById('lista-provas').getElementsByTagName('li');		
	for (var i = 0; i<li.length; i++){
		var el = li[i];
		el.className = '';
	}
}
function findTarget(elem){
	var el;
	if (window.event && window.event.srcElement)
		el = window.event.srcElement;
	if (elem && elem.target)
		el = elem.target;
	if (!el) return;	
	return el;
}
function ascendDOM(e, target){
	while(e.nodeName.toLowerCase() != target && e.nodeName.toLowerCase() != 'html')
	e = e.parentNode;	
	return (e.nodeName.toLowerCase() == 'html') == 'html' ? null : e;
}

function ativaLi(elem){
	var trgt = findTarget(elem);
	trgt = ascendDOM(this, 'li');
	clearLi();
	trgt.className = 'ativo';
}
function start(sigla){
	var li = document.getElementById('lista-provas').getElementsByTagName('li');
	var gpAtivo = document.getElementById("gp-" + sigla);
	gpAtivo.className = 'ativo';
	
	for (var i = 0; i<li.length; i++){
		var a = li[i].getElementsByTagName('a')[0];
		a.onmouseover = ativaLi;
	}
}



function intercalacor(){
	var tabela = document.getElementById("col-centro").getElementsByTagName('table')[0];
	var trs = tabela.getElementsByTagName('tr');	
	for (var i = 0 ; i < trs.length; i++){
		if (i%2 != 0)
		trs[i].className = "odd";
	}
}



function show(elm){ 
elm.className="ativo";
}
function hide(elm){ 
elm.className="";
}