function detection() 

{

 if (navigator.appVersion.indexOf('Mac') != -1)

      {

  		if(navigator.appName == "Netscape")

	    	document.write('<LINK REL=STYLESHEET HREF="text_mac.css" TYPE="text/css">');

	    else

			document.write('<LINK REL=STYLESHEET HREF="text_pce.css" TYPE="text/css">')

	  }

 else

	 if(navigator.appName == "Netscape")

	     document.write('<LINK REL=STYLESHEET HREF="text_pcn.css" TYPE="text/css">');

	 else

		 document.write('<LINK REL=STYLESHEET HREF="text_pce.css" TYPE="text/css">');


}