// auto style
  // usage:
  // <script language="Javascript" src="/js/styles.js"></script>
  // <script language="Javascript">
  // <!--
  //	writeCSS(0);
  // -->
  // </script>
  
  
  var agt=navigator.userAgent.toLowerCase(); 
    // *** BROWSER VERSION *** 
    // Note: On IE5, these return 4, so use is_ie5up to detect IE5. 
    var is_major = parseInt(navigator.appVersion); 
    var is_minor = parseFloat(navigator.appVersion); 

    var is_mac = (agt.indexOf("mac") !=-1);

    // Note: Opera and WebTV spoof Navigator.  We do strict client detection. 
    // If you want to allow spoofing, take out the tests for opera and webtv. 
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1) 
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1) 
                && (agt.indexOf('webtv')==-1)); 
    var is_nav2 = (is_nav && (is_major == 2)); 
    var is_nav3 = (is_nav && (is_major == 3)); 
    var is_nav4 = (is_nav && (is_major == 4)); 
    var is_nav4up = (is_nav && (is_major >= 4)); 
    var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) || 
                          (agt.indexOf("; nav") != -1)) ); 
    var is_nav5 = (is_nav && (is_major == 5)); 
    var is_nav5up = (is_nav && (is_major >= 5)); 

    var is_ie   = (agt.indexOf("msie") != -1); 
    var is_ie3  = (is_ie && (is_major < 4)); 
    var is_ie4  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-1) ); 
    var is_ie4up  = (is_ie  && (is_major >= 4));
    
    var is_ie5_1_mac = (is_ie && is_mac && (is_major == 4) && (agt.indexOf("msie 5.13")!=-1) ); 
    var is_ie5up  = (
    	is_ie && (is_major == 4) 
    		&& 
    		(
    			(agt.indexOf("msie 5.0")!=-1) || (agt.indexOf("msie 5.5")!=-1) // || (agt.IndexOf("msie 6")!=-1)
    		) 
    	); 

 if (agt.indexOf("mac") !=-1) 
 {

	if (is_nav5up) 
	{
	  
	  styleSheet = "mac_ns6";
	
	} 
	else if (is_ie5_1_mac) 
	{
	  
	  styleSheet = "mac_ie5_1"; 
	  
	  
	} 
	else if (is_ie5up) 
	{
	  
	  styleSheet = "mac_ie5";
	  
	  
	} 
	else 
	{
	 
	 styleSheet = "mac";
	 
	}

 } 
 else 
 {
	 
	 if (is_nav4up) 
	 {
	 	
	   styleSheet = "win_nav4up";
	 
	 } 
	 else 
	 {
	 
	   styleSheet = "win_ie4up";
 	 
 	 }
 } 
 
 
 function writeCSS (level) {
   var prefix = "";
   if (level == -1) {
   	prefix = '/';
   } else {
   	for (i=1; i<=level; i++) {
   	  prefix += '../';
   	}
   }

   var href = prefix + '/css' + '/styles_' + styleSheet + '.css';
   var link = "<link rel='stylesheet' type='text/css' href='" + href + "'>";
   document.write(link);
}