var browser;
var message;

if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
 var ieversion = new Number(RegExp.$1) // capture x.x portion and store as a number
 if (ieversion < 8.0){window.location = "../browsers.html";}
}

else if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
 var ieversion = new Number(RegExp.$1) // capture x.x portion and store as a number
 if (ieversion < 9.0){browser = "IE";}
}

else if (/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Firefox/x.x or Firefox x.x (ignoring remaining digits);
 var ffversion = new Number(RegExp.$1) // capture x.x portion and store as a number
 if (ffversion < 3.5){browser = "FF";}
}
	
else if (/Opera[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Opera/x.x or Opera x.x (ignoring remaining decimal places);
 var oprversion = new Number(RegExp.$1) // capture x.x portion and store as a number
 if (oprversion < 11.0){browser = "OP";}
}

else {browser = "";}


if (browser == "IE") {message = "<div id='browser_alert'><h3>Opgelet!</h3><img src='../images/internet_explorer.png' alt='' /><p>Deze website werkt beter in <a href='http://windows.microsoft.com/nl-BE/internet-explorer/downloads/ie' target='_blank' >Internet Explorer 9</a>!</p></div>";}
	
else if (browser == "FF") {message = "<div id='browser_alert'><h3>Opgelet!</h3><img src='../images/firefox.png' alt='' /><p>Deze website werkt beter in een nieuwere versie van <a href='http://www.mozilla.org/nl/firefox/new/' target='_blank' >Firefox</a>!</p></div>";}
	
else if (browser == "OP") {message = "<div id='browser_alert'><h3>Opgelet!</h3><img src='../images/opera.png' alt='' /><p>Deze website werkt beter in <a href='https://www.google.com/chrome/' target='_blank' >Google Chrome</a>, <a href='http://www.apple.com/safari/' target='_blank' >Apple Safari</a>, <a href='http://www.mozilla.org/nl/firefox/new/' target='_blank' >Mozilla Firefox</a> of <a href='http://windows.microsoft.com/nl-BE/internet-explorer/downloads/ie' target='_blank' >Microsoft Internet Explorer 9</a>!</p></div>";}

else {message = "";}

document.getElementById('browser_alert_container').innerHTML = message;