var xmlHttp;

function limpiar(div_id){
	document.getElementById(div_id).innerHTML="";	
}

function actualizar(){ 
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null){
		alert ("Browser does not support HTTP Request");
		return;
	}
	var url="/plantillas/multimedia/live/live_encontexto.php";
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}
	
function stateChanged(){
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){ 
		document.getElementById("en_contexto").innerHTML=xmlHttp.responseText;
	} 
}
	
function GetXmlHttpObject(){
	var xmlHttp=null;
	try{
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch (e){
		//Internet Explorer
		try{
	  		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
	  	}
	 	catch (e){
	  		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
	  	}
	}
	return xmlHttp;
}