var ns4 = (navigator.appName == 'Netscape' && parseInt(navigator.appVersion) == 4);
var ns6 = (document.getElementById)? true : false;
var ie4 = (document.all)? true : false;

function openTourWindow(url) {
  tourwin = window.open(url,"tourwin",'toolbar=1,location=1,directories=0,status=1,menubar=1,scrollbars=1,resizable=1,width=520,height=350');
}

function bookmarkPage(url, who) {
  if (ie4) { 
    window.external.AddFavorite(url, who); 
  }
  else { 
    alert("To bookmark this page, press Control+D"); 
  }
}

function checkFirst(link,url,e) {
  if (ie4) { 
    if (e.ctrlKey & e.altKey) {
      link.href = url;
    }
  }
  else {
    if ((e.modifiers & Event.CONTROL_MASK) && (e.modifiers & EVENT.ALT_MASK)) {
      link.href = url;
    }
  }
}

function trim(str) {
    return str.replace(/^\s*/, '').replace(/\s*$/, '');
}