var stylemac = '../css/mac.css';		//mac
var styleWinIE = '../css/win_ie.css';	//win_ie
var styleWinNN = '../css/win_nn.css';	//win_nn

	if (!navigator.platform.match(/win/i)){
		var style = stylemac;
	}else{
		if (navigator.appName.match(/microsoft/i)){
			var style = styleWinIE;
		}else{
			var style = styleWinNN;
		}
	}
	document.write('<link rel="stylesheet" href="'+style+'" type="text/css">');