function getRequestObj(){
	var returnVal = null;

	if (window.XMLHttpRequest){
	    returnVal = new XMLHttpRequest();
	} else if (window.ActiveXObject){
		returnVal = new ActiveXObject("Microsoft.XMLHTTP");
	}
	return returnVal;
}

function loadBroad(channel){
	var reqOb = getRequestObj();
	if (reqOb) {
		reqOb.onreadystatechange = function(){
			if (reqOb.readyState == 4){
				if (reqOb.status == 200){
					var textObj = reqOb.responseText;
					if(textObj != "")
						document.getElementById('broadcastPlan').value = textObj;
					else
						document.getElementById('broadcastPlan').value = "Không có thông tin";
				}
			 }
		}

		reqOb.open("GET", "index.php?view=broadcast/view&channelId=" + channel, true);
		reqOb.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
	    reqOb.send(null);
	}
}