sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

function validaEmail(email){
	//Assumes that valid email addresses consist of user_name@domain.tld
	at = email.indexOf('@');
	dot = email.indexOf('.');
         
	if(at == -1 || 
		dot == -1 || 
		dot <= at + 1 ||
		dot == 0 || 
		dot == email.length - 1){
		alert("email inválido");
		document.getElementById("email").value = "";
	}
                                         
	return(true);
}

function submeteForm(nomeForm){
	var erros = 0;
	var form = document.getElementById(nomeForm);
	
	for(var x = 0; x < form.elements.length; x++){
		if(form.elements[x].value == ""){
			erros++;
		}
	}
	if(erros > 0){
		alert("Preencha todos os campos do formulário.");
	}else{
		form.submit();
	}
}

function ajusta()
{
  var alturaDivTexto = document.getElementById("principal").clientHeight;
  var alturaMenuEsquerdo = document.getElementById("esquerda").clientHeight;
  /*if (alturaDivTexto < alturaMenuEsquerdo)
  {
    document.getElementById("conteudo").style.height = alturaMenuEsquerdo;
	alert("alturaDivTexto < alturaMenuEsquerdo");
  }*/
  if (alturaMenuEsquerdo < alturaDivTexto)
  {
    //document.getElementById("menuesquerda").style.height = alturaDivTexto;
	document.getElementById("esquerda").style.height = alturaDivTexto;
	document.getElementById("direita").style.height = alturaDivTexto;
  }
}

function direciona(end){
	document.location.href = end;
}