function case_by_case(){

	apname = navigator.appName.charAt(0);
	ver  = navigator.appVersion.charAt(0);
	plat = navigator.platform.charAt(0);
	if((plat == "M")&&(apname == "M")&&(ver>= 4)){ // Mac Microsoft IE 4.0以上
		document.write("<style type='text/css'>");
		document.write(".large {");
		document.write("font-size: 12pt;");
		document.write("}");
		document.write(".large2 {");
		document.write("font-size: 14pt;");
		document.write("}");
		document.write(".large3 {");
		document.write("font-size: 18pt;");
		document.write("}");
		document.write(".small {");
		document.write("font-size: 10pt;");
		document.write("}");
		document.write(".small2 {");
		document.write("font-size: 9pt;");
		document.write("}");
		document.write(".small3 {");
		document.write("font-size: 9pt;");
		document.write("}");
		document.write("</style>");
	}
	if((plat == "M")&&(apname == "N")&&(ver>= 4)){ // Mac Netscape 4.0以上
		document.write("<style type='text/css'>");
		document.write(".large {");
		document.write("font-size: 12pt;");
		document.write("}");
		document.write(".large2 {");
		document.write("font-size: 14pt;");
		document.write("}");
		document.write(".large3 {");
		document.write("font-size: 18pt;");
		document.write("}");
		document.write(".small {");
		document.write("font-size: 10pt;");
		document.write("}");
		document.write(".small2 {");
		document.write("font-size: 9pt;");
		document.write("}");
		document.write(".small3 {");
		document.write("font-size: 9pt;");
		document.write("}");
		document.write("</style>");
	}
	if((plat == "W")&&(apname == "M")&&(ver>= 4)){ // Win Microsoft IE 4.0以上
		document.write("<style type='text/css'>");
		document.write(".large {");
		document.write("font-size: 11pt;");
		document.write("}");
		document.write(".large2 {");
		document.write("font-size: 12pt;");
		document.write("}");
		document.write(".large3 {");
		document.write("font-size: 16pt;");
		document.write("}");
		document.write(".small {");
		document.write("font-size: 10pt;");
		document.write("}");
		document.write(".small2 {");
		document.write("font-size: 9pt;");
		document.write("}");
		document.write(".small3 {");
		document.write("font-size: 8pt;");
		document.write("}");
		document.write("</style>");
	}
	if((plat == "W")&&(apname == "N")&&(ver>= 4)){ // Win Netscape 4.0以上
		document.write("<style type='text/css'>");
		document.write(".large {");
		document.write("font-size: 11pt;");
		document.write("}");
		document.write(".large2 {");
		document.write("font-size: 12pt;");
		document.write("}");
		document.write(".large3 {");
		document.write("font-size: 16pt;");
		document.write("}");
		document.write(".small {");
		document.write("font-size: 10pt;");
		document.write("}");
		document.write(".small2 {");
		document.write("font-size: 9pt;");
		document.write("}");
		document.write(".small3 {");
		document.write("font-size: 8pt;");
		document.write("}");
		document.write("</style>");
	}
	document.close();
}

case_by_case();