function isNumberKey(evt)
{
  var charCode = (evt.which) ? evt.which : event.keyCode
  if (charCode > 31 && charCode!=46 && charCode!=44 && (charCode < 48 || charCode > 57))
    return false;
  return true;
}

function openPopup(img,w,h) {
  window.open(img,'zoom','location=no,menubar=no,titlebar=no,toolbar=no,width='+w+',height='+h);
}

function openPopupScroolBar(img,w,h) {
  window.open(img,'zoom','location=no,menubar=no,titlebar=no,toolbar=no,scrollbars=yes,width='+w+',height='+h);
}

function showDivCarrinho(onoff,artigo) {
  screenW = screen.width;
  screenH = screen.height;
  myDivW = 350;
  myDivH = 150;
  myDivL = screenW/2 - myDivW/2;
  myDivT = screenH/2 - myDivH/2;
  
  myDiv = document.getElementById('divCarrinho');
  
  if (onoff=="on")
  {
    myDiv.style.position = "absolute";
    myDiv.style.left     = myDivL+"px";
    myDiv.style.top      = myDivT+"px";
    myDiv.style.width    = myDivW+"px";
    myDiv.style.height   = myDivH+"px";
		myDiv.style.visibility="visible";
	}
	else {
	  myDiv.style.visibility="hidden";
  }
  
  ConfirmarCarrinho(artigo);
}

function validarForm() {
  var formOK = true;

  if ((document.registarClientesForm.cli_nome.value=='') || (document.registarClientesForm.cli_morada.value=='') || (document.registarClientesForm.cli_localidade.value=='') ||
      (document.registarClientesForm.cli_codpostal.value=='') || (document.registarClientesForm.cli_telefone.value=='') || (document.registarClientesForm.cli_fax.value=='') ||
      (document.registarClientesForm.cli_telemovel.value=='') || (document.registarClientesForm.cli_email.value=='') || (document.registarClientesForm.cli_contribuinte.value==''))  {
    formOK = false;
  }
  return formOK;
}

function redirect(url) {
  window.location.href = url;
}