// Files and directory structures
	var cssDir = "./scripts/";
	var winNS4CSS = "styles_ns.css";
	var winIECSS = "styles_ie.css";
	var macCSS = "styles_ie.css";
	var macNS4CSS = "styles_ns.css";
	var unixCSS = "styles_ie.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_nav4 = (is_nav && (is_major == 4));
	var is_nav5 = (is_nav && (is_major == 5));
	var is_nav6 = (is_nav && (is_major == 6));
	var is_nav4up = (is_nav && (is_major >= 4));
	var is_nav6up = (is_nav && (is_major >= 6));
	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_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_irix || is_sco ||
	is_unixware || is_mpras || is_reliant ||
	             is_dec || is_sinix || is_aix || is_bsd || is_freebsd);

	// Load HOME stylesheet
	ChooseStyleSheet();

	// Handle Navigator 4 window resizing
	if (is_nav4) {
	   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)) {
	     location.reload();
	   }
	   return false;
	}

// Function to choose the style sheet for use based on the platform
	// and browser version
	function ChooseStyleSheet() {
	  var fileHead = cssDir;
	  var styles;
	  if (is_win) {
		if (is_nav4) {
	      styles = fileHead + winNS4CSS;
		} else {
		  styles = fileHead + winIECSS;
		}
	  } else if (is_mac) {
	      if (is_ie5up) {
	        styles = fileHead + winIECSS;
		  } else if (is_ie4) {
		  styles = fileHead + macNS4CSS;		  
		  } else if (is_nav4) {
		  styles = fileHead + macNS4CSS;		  
		  } else {
		    styles = fileHead + macCSS;
		  }
	  } else if (is_linux) {
	      if (is_nav4) {
	        styles = fileHead + macNS4CSS;
		  } else {
		    styles = fileHead + winIECSS;
		  }
	  } else if (is_hpux) {
	      if (is_ie5) {
	        styles = fileHead + winIECSS;
		  } else if (is_nav4) {
		  styles = fileHead + macNS4CSS;		  
		  } else {
		    styles = fileHead + unixCSS;
		  }
	  } else if (is_sun) {
	      if (is_nav4) {
	        styles = fileHead + macNS4CSS;
		  } else {
		    styles = fileHead + unixCSS;
		  }
	  } else if (is_unix) {
	    styles = fileHead + unixCSS;
	  } else {
		styles = fileHead + winIECSS;
	  }
	  document.write("<link rel=\"stylesheet\" type=\"text/css\" href=\"" + styles + "\">");
	  return true;
	}