var request = false;

if (!request && typeof XMLHttpRequest != 'undefined') {
  request = new XMLHttpRequest();
}

function ajaxSwitch(content) {

/*the name of your page with the content goes here */
var url = "seriescontent.php?showit=" + escape(content);
request.open("GET", url, true);
request.onreadystatechange = go;
request.send(null);
}

function go() {
  if (request.readyState == 4) {
	  if (request.status == 200) {
		var response = request.responseText;
/* 'panel' is the name of my div that will contain the info */
		document.getElementById("panel").innerHTML = response;
	  }
  }
}

function showIt() {
	var aTags=document.getElementById('map').getElementsByTagName('a');
	for (i=0; i<aTags.length; i++) {
		aTags[i].onclick=function() {
			var show=this.href.split('content=')[1];
			ajaxSwitch(show);
			return false;
		}
	}
}
window.onload=showIt;