// JavaScript Document
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_changeProp(objName,x,theProp,theValue) { //v6.0
  var obj = MM_findObj(objName);
  if (obj && (theProp.indexOf("style.")==-1 || obj.style)){
    if (theValue == true || theValue == false)
      eval("obj."+theProp+"="+theValue);
    else eval("obj."+theProp+"='"+theValue+"'");
  }
}

function MM_goToURL() { //v3.0
  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.location.href=theURL; 
 //window.open(theURL,winName,features);
}

function RS_realsalink(id,tipo){
if (tipo==1){
	MM_changeProp(id,'','style.fontSize','14px','DIV');
	MM_changeProp(id,'','style.color','#F70F62','DIV');
}
if (tipo==0){ 
	MM_changeProp(id,'','style.fontSize','12px','DIV');
	MM_changeProp(id,'','style.color','#004D8B','DIV');
}
}


function RS_run(){
MM_preloadImages( 'imagens/s-info.png','imagens/s-arquivo.png',
		  'imagens/s-www.png','imagens/s-desafio1.png',
		  'imagens/s-desafio2.png');				  
}

String.prototype.trim =  function() {
  return (this.replace(/^[\s\xA0]+/, "").replace(/[\s\xA0]+$/, ""));
}

function get_extension(string){
 temp=string.split('.');
 ext=temp[temp.length -1].toLowerCase(); 
 if (ext=='') ext='undefined';
 return ext;
}

/* exemplo is_validExt('ficheiro','txt pdf doc '); */
function is_validExt(objname,extension){
 obj=MM_findObj(objname);
 ext=get_extension(obj.value);
 extension=extension.toLowerCase();

 numeric_result=extension.indexOf(ext);
 if (numeric_result!=-1) result=true;
 else result=false;
 
 return result;
}



function submit_form(formname){
  formobj=MM_findObj(formname);
  formobj.submit();
}

function alfanumeric_text(o){
  o.value=o.value.toLowerCase().replace(/([^0-9a-z])/g,"");
}

function numeric_text(o){
  o.value=o.value.toLowerCase().replace(/([^0-9])/g,"");
}

function is_validEmail(email, required) {
    if (required==undefined) {
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! all_validChars(email)) {
        return false;
    }
    if (email.indexOf("@") < 1) { 
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) { 
        return false;
    } else if (email.indexOf("@") == email.length) { 
        return false;
    } else if (email.indexOf("..") >=0) { 
	return false;
    } else if (email.indexOf(".") == email.length) { 
	return false;
    }
    return true;
}

function all_validChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}

function validar_registofinal(){
var form=  MM_findObj('registarform');
var nome=  MM_findObj('nome');
var apelido=  MM_findObj('apelido');
var email=  MM_findObj('email');
var erro= MM_findObj('erro');
var result=true;
    nome.value=nome.value.trim(nome.value);
    apelido.value=apelido.value.trim(apelido.value);

  if (!is_validEmail(email.value)) {result=false; erro.innerHTML='Erro, o E-mail n&atilde;o &eacute; valido!'; }
  if (apelido.value.length<1){ result=false; erro.innerHTML='Erro, o campo Apelido est&aacute; vazio!'; }
  if (nome.value.length<1){ result=false; erro.innerHTML='Erro, o campo Nome est&aacute; vazio!'; }
  
    if (result)  { form.submit();}
}

function validar_recuperar(){
var result=true;
var erro= MM_findObj('erro');
var form=  MM_findObj('recuperarform');
var user=  MM_findObj('utilizador');
var email=  MM_findObj('email');
  
	if (!is_validEmail(email.value)) {result=false; erro.innerHTML='Erro, o E-mail n&atilde;o &eacute; valido!'; }

    if (user.value=='') {
		erro.innerHTML="Erro, o campo do utilizador est&aacute; vazio!";
		result=false;
	}
    if (result)  { form.submit();}
}

function validar_upload(){	
var result=true;
var objname='resposta';	
var extension='txt pdf rtf doc jpg png gif';
var erro= MM_findObj('erro');
var form=  MM_findObj('submeterform');

    if (!is_validExt(objname,extension)){     
      erro.innerHTML="Erro, o ficheiro n&atilde;o é valido!";
  	  result=false;
    }
    
    if (result)  { form.submit();}
}

function validar_login(){	
var result=true;
var erro=  MM_findObj('erro');
var form=  MM_findObj('loginform');
var user=  MM_findObj('utilizador');
var pass=  MM_findObj('password');

	if (pass.value=='') {
		erro.innerHTML="Erro, o campo da password est&aacute; vazio!"; 
		result=false;
	}	
    if (user.value=='') {
		erro.innerHTML="Erro, o campo do utilizador est&aacute; vazio!";
		result=false;
	}    
    if (result)  { form.submit();}
}

function validar_registo(){
var form=  MM_findObj('registarform');
var user=  MM_findObj('utilizador');
var p1= MM_findObj('password');
var p2= MM_findObj('passwordcheck');
var erro= MM_findObj('erro');
var result=true;
if (p1.value!=p2.value) {
	erro.innerHTML="Erro, as password's n&atilde;o s&atilde;o iguais!";
	result=false;
}

if (p1.value=='') {
	erro.innerHTML="Erro, o campo da password est&aacute; vazio!";
	result=false;
}

if (user.value=='') {
	erro.innerHTML="Erro, o campo do utilizador est&aacute; vazio!";
	result=false;
}

 if (result)  { form.submit();}
}