var cssDir = "";

var stylePrefix = "";

var winNSCSS = "ns_style.css";

var winIECSS = "ie_style.css";

var macCSS = "mac_style.css";



// *************************************************************

//  CLIENT_SIDE SNIFFER CODE

// *************************************************************

// convert all characters to lowercase to simplify testing 

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); 



// *** BROWSER TYPE *** 

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_nav4up = (is_nav && (is_major >= 4));  

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  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );  

var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4);  



// *** PLATFORM ***

var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );

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

var is_sun   = (agt.indexOf("sunos")!=-1);

var is_irix  = (agt.indexOf("irix") !=-1);    // SGI

var is_hpux  = (agt.indexOf("hp-ux")!=-1);

var is_aix   = (agt.indexOf("aix") !=-1);      // IBM

var is_linux = (agt.indexOf("inux")!=-1);

var is_sco   = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);

var is_unixware = (agt.indexOf("unix_system_v")!=-1); 

var is_mpras    = (agt.indexOf("ncr")!=-1); 

var is_reliant  = (agt.indexOf("reliantunix")!=-1);

var is_dec   = ((agt.indexOf("dec")!=-1) || (agt.indexOf("osf1")!=-1) || 

       (agt.indexOf("dec_alpha")!=-1) || (agt.indexOf("alphaserver")!=-1) || 

       (agt.indexOf("ultrix")!=-1) || (agt.indexOf("alphastation")!=-1)); 

var is_sinix = (agt.indexOf("sinix")!=-1);

var is_freebsd = (agt.indexOf("freebsd")!=-1);

var is_bsd = (agt.indexOf("bsd")!=-1);

var is_unix  = ((agt.indexOf("x11")!=-1) || is_sun || is_irix || is_hpux || 

             is_sco ||is_unixware || is_mpras || is_reliant || 

             is_dec || is_sinix || is_aix || is_linux || is_bsd || is_freebsd);



			 

//  Select the appropriate stylesheet

if ((is_nav4up || is_ie4up) || (!is_nav && !is_ie)) {

  ChooseStyleSheet();

}



// Handle Navigator 4 window resizing

if (is_nav4up) {

   var initWidth, initHeight;

   initWidth = window.innerWidth;

   initHeight = window.innerHeight;

   window.captureEvents(Event.RESIZE);

   window.onresize = handleResize;

}



// *********************************************************************

//  UTILITY FUNCTIONS

// *********************************************************************

// Function to handle window resizing on Navigator 4

function handleResize() {

   if (((initWidth != window.innerWidth) || (initHeight != window.innerHeight)) && (typeof disableReload == "undefined")) {

     location.reload();

   }

   return false;

}


// Function to choose the style sheet for use based on the platform

// and browser version

function ChooseStyleSheet() {

  var fileHead = cssDir + stylePrefix;

  var styles;

  if (is_win) {

	if (is_nav) {

      styles = fileHead + winNSCSS;

	} else {

	  // Windows Netscape fonts need to be larger than those for IE

	  styles = fileHead + winIECSS;

	}

  } else if (is_mac) {

      if (is_ie5up) {

	    // Default font settings for Mac IE5 match PC IE fonts

        styles = fileHead + winIECSS;

	  } else {

	    styles = fileHead + macCSS;

	  }


  } else {

    // Default style = macCSS

	// Macintosh stylesheets have the largest font sizes, which

	// will ensure readability

	styles = fileHead + macCSS;

  }

  document.write("<link rel=\"stylesheet\" type=\"text/css\" href=\"" + styles + "\">");

  return true;

}