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">');}
}



function main_menu() {
	document.write('<img src="image/space.gif" width="1" height="19"><br>'+"\n");
	document.write('<img src="image/head01.gif" width="700" height="175" border="0" USEMAP="#header_Map"><br>'+"\n");
	document.write('<MAP NAME="header_Map">'+"\n");
	document.write('<area shape="rect" alt="top" coords="14,107,73,139" href="main.html">'+"\n");
	document.write('<area shape="rect" alt="disc" coords="81,107,149,139" href="disc.html">'+"\n");
	document.write('<area shape="rect" alt="profile" coords="156,107,251,139" href="profile.html">'+"\n");
	document.write('<area shape="rect" alt="link" coords="256,107,332,139" href="link.html">'+"\n");
	document.write('<area shape="rect" alt="blog" coords="338,107,414,139" href="http://atarii.exblog.jp/">'+"\n");
	document.write('<area shape="rect" alt="myspace" coords="420,107,510,139" href="http://www.myspace.com/atarisapporo">'+"\n");
	document.write('<area shape="rect" alt="bbs" coords="518,107,576,139" href="http://www3.rocketbbs.com/604/atari.html" target="_blank">'+"\n");
	document.write('</MAP>'+"\n");
}