var fieldstocheck = new Array();
    fieldnames = new Array();

function checkform() {
  for (i=0;i<fieldstocheck.length;i++) {
    if (eval("document.subscribeform.elements['"+fieldstocheck[i]+"'].value") == "") {
      alert("Por favor insira o endereço de email!");
      eval("document.subscribeform.elements['"+fieldstocheck[i]+"'].focus()");
      return false;
    }
  }

  return true;
}

function addFieldToCheck(value,name) {
  fieldstocheck[fieldstocheck.length] = value;
  fieldnames[fieldnames.length] = name;
}

function compareEmail() {
  return (document.subscribeform.elements["email"].value == document.subscribeform.elements["emailconfirm"].value);
}