var ua = navigator.userAgent;
var an = navigator.appName;

var Explorer7 = ( ua.indexOf("MSIE 7", 0) >= 0 );
var Explorer6 = ( ua.indexOf("MSIE 6", 0) >= 0 );
var Explorer5 = ( ua.indexOf("MSIE 5", 0) >= 0 );
var Explorer = ( ua.indexOf("MSIE", 0) >= 0 );
var Mozilla5 = ( ua.indexOf("Mozilla/5", 0) >= 0 );
var Mozilla4 = ( ua.indexOf("Mozilla/4", 0) >= 0 );
var Opera = ( an.indexOf ("Opera") != -1 );

if ( ua.indexOf ("Mac") != -1 ) {

	// Macintoshは字間を詰める
	document.writeln('<style type="text/css">');
	document.writeln('*{ letter-spacing: -0.05em; }');
	document.writeln('</style>');

	} else {

	if ( Explorer6 || Explorer5 ) {

		// 透過pngを使用する
//		document.writeln('<script type="text/javascript" src="/js/iepng.js"></script>');

		// min-max用
		document.writeln('<script type="text/javascript" src="/js/height-minmax.js"></script>');
	}
}