var ie = document.all ? 1 : 0;
var ns = document.layers ? 1 : 0;
var mac = ((navigator.appVersion.indexOf("Mac") != -1)) ? 1 : 0;
var pc = ((navigator.appVersion.indexOf("Mac") == -1)) ? 1 : 0;

function openNewWin(theURL,winName,features) 
  {
  window.open(theURL,winName,features);
  }

function newImage(arg)
  {
  if (document.images)
    {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
    }
  }

function changeImages()
  {
  if (document.images && (preloadFlag == true))
    {
    for (var i=0; i<changeImages.arguments.length; i+=2)
      {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1]).src;
      }
    }
  }

var preloadFlag = false;