/* ***************** FUNCAO *************************** */
function checkMail(mail){
    var er = new RegExp(/^[A-Za-z0-9_\-\.]+@[A-Za-z0-9_\-\.]{2,}\.[A-Za-z0-9]{2,}(\.[A-Za-z0-9])?/);
    if(typeof(mail) == "string") {
        if(er.test(mail)) { return true; }
	}
	else if(typeof(mail) == "object") {
		if(er.test(mail.value)) { return true; }
	}
    else {
        return false;
    }
}

function isNum(event)
{
  var Key = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
  if(Key==13 || (Key >= 48 && Key <=57)) return true;
  else return false;
}

function onTopPage() {
	document.body.scrollTop=0;
}

/* ***************** DEFAULT ************************** */

function changeInputType(
  oldElm, // a reference to the input element
  iType, // value of the type property: 'text' or 'password'
  iValue, // the default value, set to 'password' in the demo
  blankValue, // true if the value should be empty, false otherwise
  noFocus) {  // set to true if the element should not be given focus
  if(!oldElm || !oldElm.parentNode || (iType.length<4) || 
    !document.getElementById || !document.createElement) return;
  var newElm = document.createElement('input');
  newElm.type = iType;
  if(oldElm.name) newElm.name = oldElm.name;
  if(oldElm.id) newElm.id = oldElm.id;
  if(oldElm.className) newElm.className = oldElm.className;
  if(oldElm.style.width) newElm.style.width = oldElm.style.width;
  if(oldElm.size) newElm.size = oldElm.size;
  if(oldElm.tabIndex) newElm.tabIndex = oldElm.tabIndex;
  if(oldElm.accessKey) newElm.accessKey = oldElm.accessKey;
  newElm.onfocus = function(){return function(){
    if(this.hasFocus) return;
    var newElm = changeInputType(this,'password',iValue,
      (this.value.toLowerCase()==iValue.toLowerCase())?true:false);
    if(newElm) newElm.hasFocus=true;
  }}();
  newElm.onblur = function(){return function(){
    if(this.hasFocus)
    if(this.value=='' || (this.value.toLowerCase()==iValue.toLowerCase())) {
      changeInputType(this,'text',iValue,false,true);
    }
  }}();
 // hasFocus is to prevent a loop where onfocus is triggered over and over again
  newElm.hasFocus=false;
  oldElm.parentNode.replaceChild(newElm,oldElm);
  if(!blankValue) newElm.value = iValue;
  if(!noFocus || typeof(noFocus)=='undefined') {
    window.tempElm = newElm;
    setTimeout("tempElm.hasFocus=true;tempElm.focus();",1);
  }
  return newElm;
}

/* ******************* CONTATO ****************************** */

function validar_contato() {
	if(document.getElementById('t_nome').value=='') {
		alert('O campo nome é obrigatório!');
		document.getElementById('t_nome').focus();
		return false;
	}
	if(document.getElementById('t_email').value=='') {
		alert('O campo e-mail é obrigatório!');
		document.getElementById('t_email').focus();
		return false;
	}
	if(!checkMail(document.getElementById("t_email").value)) {
		alert('O e-mail é inválido!');
		document.getElementById("t_email").focus();	
		return false;
	}
	if(document.getElementById('t_mensagem').value=='') {
		alert('O campo mensagem é obrigatório!');
		document.getElementById('t_mensagem').focus();
		return false;
	}
	return true;
}

/* ******************* CADASTRE-SE ****************************** */
function validar_cadastrese() {
	if(document.getElementById('t_nome').value=='') {
		alert('O campo nome é obrigatório!');
		document.getElementById('t_nome').focus();
		return false;
	}
	if(document.getElementById('t_email').value=='') {
		alert('O campo e-mail é obrigatório!');
		document.getElementById('t_email').focus();
		return false;
	}
	if(!checkMail(document.getElementById("t_email").value)) {
		alert('E-mail é inválido. Tente novamente!');
		document.getElementById("t_email").focus();	
		return false;
	}
	return true;
}