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_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_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_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];}
}







// Check whether string s is empty.
function isEmpty(s) {
   return ((s == null) || (s.length == 0) || (s=="undefined"))
}


function isEmail(s)
{   

	//if (isEmpty(s)) 
   //    if (isEmail.arguments.length == 1) return false;
   //    else return (isEmail.arguments[1] == true);
   
    // is s whitespace?
    if (isEmpty(s)) return false;
    
    // there must be >= 1 character before @, so we
    // start looking at character position 1 
    // (i.e. second character)
    var i = 1;
    var sLength = s.length;

    // look for @
    while ((i < sLength) && (s.charAt(i) != "@"))
    { i++
    }

    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;

    // look for .
    while ((i < sLength) && (s.charAt(i) != "."))
    { i++
    }

    // there must be at least one character after the .
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}


function validar_email() {

	var Elemento;
	var Obj=document.DADOS;

	Elemento = Obj.frmemail;
    if (isEmail(Elemento.value)) {
		document.DADOS.submit();
	} else {
		Elemento.focus();
		alert("O campo EMAIL não está correcto!\nPor favor altere.");
	}	

}


function FormLimpar() {

	var Elemento;
	var Obj=document.DADOS;

	Elemento = Obj.frmemail;
    if (Elemento.value=="registe-se na nossa newsletter") {
		Elemento.value="";
	} 	

}



function AbrePagina(tamanho_horizontal,tamanho_vertical,url,temscroll) {

  var ah = screen.availHeight;
  var aw = screen.availWidth;
  
  var local_esquerdo = parseInt((aw-tamanho_horizontal)/2);
  var local_topo = parseInt((ah-tamanho_vertical)/2);

  window.open(url, target="_blank", "menubar=no,toolbar=no,location=no,directories=no,status=no,scrollbars=" + temscroll +",resizable=yes,dependent,titlebar=no,width=" + tamanho_horizontal + ",height=" + tamanho_vertical + ",top=" + local_topo + ",left=" + local_esquerdo);

}