Heraclitus
Register (takes few seconds), and grab your API link.
Copy/paste html code below into web pages you want to track. Just before the </body> tag:
<script type="text/javascript" src="https://n1.visitor.info/static/client.js?api=your_api_key_name"></script>
<script type="text/javascript">
var visitorCallback = function(data) {
console.log(data);
};
var visitor = new Visitor();
visitor.init(visitorCallback);
</script>
Pull API for request IDs (rid from JavaScript callback) you want to know the details for.
Here is an example info your can expect on every visitor: