var w = screen.width  //画面幅
var cssHTML = '<link rel="stylesheet" type="text/css" href="'
if(( w >640 )&&( w <= 800 )){//画面幅が640以上800以下
	cssHTML += 'http://www.h-niki.com/thin.css';
}


else if( w >= 1281 ){//画面幅が1281以上
	cssHTML += 'http://www.h-niki.com/wide.css';
}
else{//その他
	cssHTML += 'http://www.h-niki.com/styles.css';
}
cssHTML += '">'
document.write(cssHTML)