function getQueryVariable_default(variable, defaultValue) {
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return pair[1];
    }
  }
  return defaultValue;
}

function showHideDiv(div, show)
{
    var divstyle = new String();
    divstyle = document.getElementById(div).style.visibility;
    if(divstyle.toLowerCase()=="visible" || divstyle == "")
    {
        if (!show)
            document.getElementById(div).style.visibility = "hidden";
    }
    else
    {
        if (show)
            document.getElementById(div).style.visibility = "visible";
    }
}