var preloadFlag=false;
function loadImage(name, src) {
  eval(name + " = new Image();");
  eval(name + '.src = "'+src+'";');
}

function changeImage(dpic, pic) {
  if (document.images && (preloadFlag == true))
    eval("document.images['"+dpic+"'].src="+pic+".src;");
}

function enable(what) {
  changeImage(what, what+'_');
}

function disable(what) {
  changeImage(what, what);
}

function enableLM(what) {
  changeImage(what, what+'_');
  changeImage('go'+what, 'go_');
}

function disableLM(what) {
  changeImage(what, what);
  changeImage('go'+what, 'go');
}

function openWindow(url, name, wi, he) {
   window.open(url, name, "scrollbars=0,status=0,toolbar=0,directories=0,menubar=0,location=0,resizable=0,width="+wi+",height="+he);   
}

function helpwnd(url) {
  var hwin = window.open(url,"helpwnd","width=500,height=500,scrollbars=yes,toolbar=no,resizable=0");
  hwin.focus();
}


if (navigator.appName == "Netscape") {
  isNetscape = true;
  version = parseFloat(navigator.appVersion);
  if (navigator.product!='Gecko') {
    isNS4 = true;
  }else{
    isNS4 = false;
    document.all = document.getElementsByTagName("*");
  }
  if (version<5) {
    isNS4 = true;
  }
}else{
  isNetscape = false;
  isNS4 = false;
}