if (navigator.platform.indexOf('Win')!=-1) {

	if(navigator.userAgent.indexOf("Firefox") != -1)
	{
   document.write('<link href="css/style_content.css" rel="stylesheet" type="text/css">');
	}
	else if(navigator.userAgent.indexOf("MSIE") != -1)
	{
   document.write('<link href="css/style_content_ie.css" rel="stylesheet" type="text/css">');
	}
	else if(navigator.userAgent.indexOf("Mozilla") != -1)
	{
   document.write('<link href="css/style_content.css" rel="stylesheet" type="text/css">');
	}
	else if(navigator.userAgent.indexOf("Opera") != -1)
	{
	document.write('<div>Helaas ondersteunt uw browser de opmaak van deze pagina s niet. Bekijk deze site met MSIE of Mozilla FireFox.</div>');
	}
}

else if (navigator.platform.indexOf('Mac')!=-1) {
	 if(navigator.userAgent.indexOf("MSIE 5") != -1)
	{
   document.write('<link href="css/style_content_ie.css" rel="stylesheet" type="text/css">');
	}
	else if(navigator.userAgent.indexOf("Safari") != -1)
	{
	document.write('<link href="css/style_content.css" rel="stylesheet" type="text/css">');
	}
	else if(navigator.userAgent.indexOf("Firefox") != -1)
	{
	document.write('<link href="css/style_content.css" rel="stylesheet" type="text/css">');
	}
}

 else 
{
document.write('<div>Helaas ondersteunt uw browser de opmaak van deze pagina s niet. Bekijk deze site met Mozilla FireFox of Safari.</div>');
}