if (navigator.platform.indexOf('Mac') != -1) 
	{
	    if (navigator.userAgent && navigator.userAgent.indexOf("Opera")!= -1) 
		{
	        set_name="mac_op";
	    }
		else
		{
	        set_name="style";
	    }
	}
else 
	{
        set_name="style";
    }
	
var set_style = 'css/' + set_name + '.css';
document.write("<LI" + "NK REL='StyleSheet' HREF='" + set_style +"' TYPE='text/css'>");