//winTest = navigator.platform.indexOf("Win");
//if(winTest > -1) {
	//alert('use pc css!')
	//document.writeln('<link href="webstructure/style/pc.css" rel="stylesheet" type="text/css">');	
//}else{
	//alert('use Mac css!');
	document.writeln('<link href="webstructure/style/mac.css" rel="stylesheet" type="text/css">');
//}