function track(follow){		 
	// write tracking log
	var link = follow.href;
	var target = follow.target;	 
	var request = "/track.php?click="+link;
	var oScript = document.getElementById("dynamic_script_injection_node");
	var head = document.getElementsByTagName("head").item(0);
		if (oScript) {          
			head.removeChild(oScript);
		}
		script = document.createElement("script");
		script.setAttribute("id", "dynamic_script_injection_node");
		script.setAttribute("type", "text/javascript");
		script.setAttribute("src", request);
		head.appendChild(script);
	// tracking log end
	window.open(link,target);
}