var xmlhttp;

function changemedia(campus) {
	//alert('The string: '+ str);
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null){
  		alert ("Browser does not support HTTP Request");
  		return;
	}
	var url="http://www.newbreak.org/lib/selectmap/selectmap.php?campus="+campus;
	//url=url+"?q="+str;
	//url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange=stateChanged;
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
}

function stateChanged(){
	if (xmlhttp.readyState==4){
		document.getElementById("mediaplayer").innerHTML=xmlhttp.responseText;
	}
}

function GetXmlHttpObject(){
	if (window.XMLHttpRequest){
	  return new XMLHttpRequest();
    }
	if (window.ActiveXObject){
		return new ActiveXObject("Microsoft.XMLHTTP");
  	}
	return null;
}