<!--

function Is() {
  var agent 	= navigator.userAgent.toLowerCase();
  this.version 	= parseInt(navigator.appVersion);
  this.ns 	= ((agent.indexOf("mozilla") != -1) && 
  	           (agent.indexOf("spoofer") == -1) &&
                   (agent.indexOf("compatible") == -1)
	          );
  this.ns4 	= (this.ns && (this.version == 4));
  this.ns6 	= (this.ns && (this.version == 5));
  this.ie	= (agent.indexOf("msie") != -1);
  this.ie4	= (this.ie && (this.version >= 4));
}

var is = new Is();

if (is.ns4) {
  document.write("<link type='text/css' rel='stylesheet' href='stylesheets/ns4.css'>"); 
} else if (is.ns6) {
  document.write("<link type='text/css' rel='stylesheet' href='stylesheets/ns6.css'>"); 
} else {
  document.write("<link type='text/css' rel='stylesheet' href='stylesheets/ie4.css'>"); 
}

//-->