var Win=(navigator.userAgent.indexOf("Win")!=-1);
var Mac=(navigator.userAgent.indexOf("Mac")!=-1);
var Explorer=(navigator.appName.indexOf("Explorer")!=-1);
var Netscape=(navigator.appName.indexOf("Netscape")!=-1);
var Version=navigator.appVersion.charAt(0);


function set_stylefile (filepath) {
	/* windows_ie_op_4_6 */
	if
	(Win && Explorer && Version=="4")
	{document.write('<LINK rel="stylesheet" href="'+filepath+'win_ie4_6.css" type="text/css">');}
	
	
	/* windows_ns_6x */
	else if
	(Win && Netscape && Version=="5")
	{document.write('<LINK rel="stylesheet" href="'+filepath+'win_ns6x_7.css" type="text/css">');}
	
	
	/* windows_ns_4x */
	else if
	(Win && Netscape && Version=="4")
	{document.write('<LINK rel="stylesheet" href="'+filepath+'win_ns4x.css" type="text/css">');}
	
	
	/* macintosh_ie_4_5x */
	else if
	(Mac && Explorer && Version=="4") 
	{document.write('<LINK rel="stylesheet" href="'+filepath+'mac_ie4_5x.css" type="text/css">');}
	
	
	/* macintosh_ns_6x */
	else if
	(Mac && Netscape && Version=="5")
	{document.write('<LINK rel="stylesheet" href="'+filepath+'mac_ns6x_7.css" type="text/css">');}
	
	
	/* macintosh_ns_4x */
	else if
	(Mac && Netscape && Version=="4")
	{document.write('<LINK rel="stylesheet" href="'+filepath+'mac_ns4x.css" type="text/css">');}
	
	
	/* other */
	else
	{document.write('<LINK rel="stylesheet" href="'+filepath+'other.css" type="text/css">');}
}