//javascripts functions

function js_popupwindow(btn, width, height)
	{
         window.open(btn,"popup","menubar=no,status=no,toolbar=no,location=no,width=" + width + ",height=" + height + ",scrollbars=yes,top=100,left=100");
	}


//browser detection functions
function browser_check()
{
  var detect = navigator.userAgent.toLowerCase();
  var OS,browser,total,thestring;
  var version = 0;

  if (checkIt('konqueror'))
  {
	browser = "Konqueror";
	OS = "Linux";
  }
  else if (checkIt('safari')) browser = "Safari"
  else if (checkIt('omniweb')) browser = "OmniWeb"
  else if (checkIt('opera')) browser = "Opera"
  else if (checkIt('webtv')) browser = "WebTV";
  else if (checkIt('icab')) browser = "iCab"
  else if (checkIt('msie')) browser = "Internet Explorer"
  else if (!checkIt('compatible'))
  {
	browser = "Netscape Navigator"
	version = detect.charAt(8);
  }
  else browser = "An unknown browser";

  if (!version) version = detect.charAt(place + thestring.length);

  if (!OS)
  {
	if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac"
	else if (checkIt('win')) OS = "Windows"
	else OS = "an unknown operating system";
  }

  return browser;

  function checkIt(string)
  {
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
  }

}