function $(elem) {
	return document.getElementById(elem);
}

function openWindow(url,title,width,height,scrollbars) {
  if (typeof scrollbars == "undefined") {
    scrollbars = "0";
  }
	popup = window.open(url, title, 'width='+width+', height='+height+', scrollbars='+scrollbars+', screenX=80,screenY=50,menubar=no,status=no,toolbar=no,resizable=yes');	
	popup.focus();
}

function changeFormState(enabled) {
  var disable;
  if (enabled) {
    disable = false;
  }
  else {
    disable = true;
  }

  var form_elements = document.forms[0].elements;
  for (var i=0; i<form_elements.length; i++) {
    if (form_elements[i].parentNode.id == "address2") { form_elements[i].disabled=disable; }
  }
}

function switchLinkState(elemID) {
	elem = $(elemID);
	if (elem.className == "active") {
		elem.className = "";
	}
	else {
		elem.className = "active";
	}
}