function popup(url,w,h){
  window.open(url,'','scrollbars=yes, toolbar=no, directories=no, location=no, status=no, menubar=no, resizable=no, width='+(w)+', height='+(h)+'');
}

function showhide(elem,state){
  document.getElementById(elem).style.display=state;
}

function delete_confirm() {
  var message = 'Dzēst!?';
  if (confirm (message)) {
    return true;
  }else{
    return false;
  }
}

function validate_registration_extra() {

	if (document.registration_extra.activity_type.value == '') {
		alert('Lūdzu ievadiet Jūsu fizisko aktivitāšu veidu!');
		return false;
	}
}