//Riconoscimento OS
var user_agent = navigator.userAgent.toLowerCase();

if ((user_agent.indexOf("win") != -1) && ("\v" != "v")) {
	
	var css_to_use = "<link rel='stylesheet' href='style_win.css' /><link rel='stylesheet' href='styleb_win.css' />";
	
	document.write(css_to_use);
}
else if ((user_agent.indexOf("win") != -1) && ("\v" == "v")) {
	
	var css_to_use = "<link rel='stylesheet' href='style_ie.css' /><link rel='stylesheet' href='styleb_ie.css' />";
	/*var roundcorners_script = "<script type='text/javascript' src='script/roundrect.min.js'></script>";*/
	document.write(css_to_use);
	/*document.write(roundcorners_script);
	RoundRect.run();*/
}
else
{
	var css_to_use = "<link rel='stylesheet' href='style.css' /><link rel='stylesheet' href='styleb.css' />";
	
	document.write(css_to_use);
}