// VALIDAÇÃO DE FORMS
function isEmpty( str){
    strRE = new RegExp( );
    strRE.compile( '^[\s ]*$', 'gi' );
    return strRE.test( str.value );
}

function notValidEmail( str ){
    mailRE = new RegExp( );
    mailRE.compile( '^[\._a-z0-9-]+@[\.a-z0-9-]+[\.]{1}[a-z]{2,4}$', 'gi' );
    return !(mailRE.test( str.value ));
}

function notChecked( box ){
    if( box.checked ){
        return false;
    }
    else{
        return true;
    }
}


function troca(id){
var img_id = 'img_' + (id); 

	if (document.getElementById)
	{
		if(document.getElementById(id).style.display == 'none')
		{
		   document.getElementById(id).style.display = 'block';
		   document.getElementById(img_id).src="/images/ico_menos.gif";

		} else 
		{
		   document.getElementById(id).style.display = 'none';
		   document.getElementById(img_id).src="/images/ico_mais.gif";

		}
		
		return false;
	}
}
				
				
// SCROLL SEM ANCHOR

function findPos(obj) {

var getObj = document.getElementById(obj);

	var curleft = curtop = 0;
	if (getObj.offsetParent) {
		curleft = getObj.offsetLeft
		curtop = getObj.offsetTop
		while (getObj = getObj.offsetParent) {
			curleft += getObj.offsetLeft
			curtop += getObj.offsetTop
		}
	}
	return [curtop];
}

function scrollPara(alvo) {
	var pos = findPos(alvo);
	window.scrollTo(0, pos);
}


function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);