ie4 = (document.all);
nn6 = (document.getElementById && navigator.appName == "Netscape");
nn4 = (document.layers);


function isDigit(e) {
	var c;
	var v;

	if(ie4) {
		v = event.keyCode;
	}
	else {
		v = e.which;
		c = String.fromCharCode(v);
	}

	if(v==0 || v==8) {
		return true;
	}
	else {
		c = String.fromCharCode(v);
		if(c>='0' && c<='9') {
			return true;
		}
	}

	return false;
}



  var _gaq = _gaq || [];
  _gaq.push(['_setAccount', 'UA-23690491-2']);
  _gaq.push(['_trackPageview']);

  (function() {
    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
  })();