var isIE = (document.all) ? true : false;
var isNS = !isIE;
var doDownload = false;

function chcolor(i, color) {
    if (isNS)
        window.document.layers['id' + i].bgColor = color;
    else if (isIE)
        window.document.all['id' + i].style.background = color;
}

function init() {
	if (isNS) block = document.blockDiv
	if (isIE) block = blockDiv.style
        if (doDownload){
          download();
        }
}

function showObject(obj) {
	if (isNS) obj.visibility = "show"
	else if (isIE) obj.visibility = "visible"
}

function hideObject(obj) {
	if (isNS) obj.visibility = "hide"
	else if (isIE) obj.visibility = "hidden"
}

function logoutUser(){
  document.location = "/package/hugin/external/component/logout.jsp";
}

function checkInput(obj, str){
  if (obj.value == ""){
      alert("Please enter \"" + str + "\".");
      obj.focus();
      return (false);
  }
  return (true);
}

function checkSelect(obj, str){
  if (obj.options[0].selected) {
    alert("Please select " + str + ".");
    obj.focus();
    return (false)
  }

  return true;
}