function getElementsByClassName(strClass)
	{
	  var ret = new Array();
	  var tag = arguments[1] || "*";
	  var node = arguments[2] || document;
	  var base = node.getElementsByTagName(tag);
	  var tBase = base.length;
	  for(var i = 0; i < tBase; i++)
	  {
		var aClass = base[i].className.split(" ");
		var taClass = aClass.length;
		for(var j = 0; j < taClass; j++)
		{
		  if(aClass[j] == strClass)
		  {
			ret[ret.length] = base[i];
			break;
		  }
		}
	  }
	  return ret;
	}
	
	function mostra(qual) {
		var links = getElementsByClassName('esconde');
		
		for (i = 0; i < links.length; i++) {
			links[i].style.display="none";
		}
		
		var tag = document.getElementById(qual);
		tag.style.display="block";
	}
	
	function mostra2(qual) {
		var links = getElementsByClassName('botao_form_galera');
		
		for (i = 0; i < links.length; i++) {
			links[i].style.display="none";
		}
		
		var tag = document.getElementById(qual);
		tag.style.display="block";
	}
	
	function acende(qual) {
		var links = getElementsByClassName('rastas');
		for (i = 0; i < qual; i++) {
			links[i].style.background="url(css/img/ic_at.png)";
		}
	}
	
	function apaga(qual) {
		var links = getElementsByClassName('rastas');
		for (i = 0; i < links.length; i++) {
			links[i].style.background="url(css/img/ic_in.png)";
		}
	}
	

//funcao que verifica se o campo eh vazio
	function isEmpty(pStrText){
	   var   len = pStrText.length;
	   var pos;
	   var vStrnewtext = "";
	
	   for (pos=0; pos<len; pos++){
		  if (pStrText.substring(pos, (pos+1)) != " "){
			 vStrnewtext = vStrnewtext + pStrText.substring(pos, (pos+1));
		  }
	   }
	
	   if (vStrnewtext.length > 0)
		  return false;
	   else
		  return true;
}
	
	//funçao que valida o formulario da galera	
	function validaGalera(formulario) {

	if (isEmpty(formulario.nome.value))
	{
		alert('Favor preencher o campo NOME!');	
		formulario.nome.focus();
		return false;
	}
	if (isEmpty(formulario.email.value))
	{
		alert('Favor preencher o campo E-MAIL!');	
		formulario.email.focus();
		return false;
	}
	if (isEmpty(formulario.titulo.value))
	{
		alert('Favor preencher o campo TITULO!');	
		formulario.titulo.focus();
		return false;
	}
	if (isEmpty(formulario.comentario.value))
	{
		alert('Favor preencher o campo COMENTARIO!');	
		formulario.comentario.focus();
		return false;
	}	
	 
	mostra2();
	return true;
}