if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
	 var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
	 if (ieversion>=8)
	  document.write("<LINK href='main.css' rel='stylesheet' type='text/css' media='all'>")
	 else if (ieversion>=7)
	  document.write("<LINK href='main.css' rel='stylesheet' type='text/css' media='all'>")
	 else if (ieversion>=6)
	  document.write("<LINK href='main.css' rel='stylesheet' type='text/css' media='all'>")
	 else if (ieversion>=5)
	  document.write("<LINK href='main.css' rel='stylesheet' type='text/css' media='all'>")
	}
	else
	 document.write("")

	if (/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Firefox/x.x or Firefox x.x (ignoring remaining digits);
	 var ffversion=new Number(RegExp.$1) // capture x.x portion and store as a number
	 if (ffversion>=3)
	  document.write("<LINK href='fmain.css' rel='stylesheet' type='text/css' media='all'>")
	 else if (ffversion>=2)
	  document.write("<LINK href='fmain.css' rel='stylesheet' type='text/css' media='all'>")
	 else if (ffversion>=1)
	  document.write("<LINK href='fmain.css' rel='stylesheet' type='text/css' media='all'>")
	}
	else
	 document.write("")

	if (/Opera[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Opera/x.x or Opera x.x (ignoring remaining decimal places);
	 var oprversion=new Number(RegExp.$1) // capture x.x portion and store as a number
	 if (oprversion>=10)
	  document.write("<LINK href='omain.css' rel='stylesheet' type='text/css' media='all'>")
	 else if (oprversion>=9)
	  document.write("<LINK href='omain.css' rel='stylesheet' type='text/css' media='all'>")
	 else if (oprversion>=8)
	  document.write("<LINK href='omain.css' rel='stylesheet' type='text/css' media='all'>")
	 else if (oprversion>=7)
	  document.write("<LINK href='omain.css' rel='stylesheet' type='text/css' media='all'>")
	 else
	  document.write("")
	}
	else
	 document.write("")