function getData(dataSource, divID) {
	var XMLHttpRequestObject = false;
	if (window.XMLHttpRequest) {
		XMLHttpRequestObject = new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
	}
	if (XMLHttpRequestObject) {
		var obj = document.getElementById(divID);
		XMLHttpRequestObject.open("GET", dataSource);
		XMLHttpRequestObject.onreadystatechange = function() {
			if (XMLHttpRequestObject.readyState == 4) {
				if (XMLHttpRequestObject.status == 200) {
					obj.innerHTML = XMLHttpRequestObject.responseText;
					delete XMLHttpRequestObject;
					XMLHttpRequestObject=null;
				} else {
					alert("Error en el módulo Ajax");
				}
			}
		}
		XMLHttpRequestObject.send(null);
	}
}


function postData(dataSource, parameters, divID) {
	// parameters es un string de tipo "var=val&var2=val2..."
	var XMLHttpRequestObject = false;
	if (window.XMLHttpRequest) {
		XMLHttpRequestObject = new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
	}
	if (XMLHttpRequestObject) {
		var obj = document.getElementById(divID);
		XMLHttpRequestObject.open("POST", dataSource);
		XMLHttpRequestObject.onreadystatechange = function() {
			if (XMLHttpRequestObject.readyState == 4) {
				obj.innerHTML = XMLHttpRequestObject.responseText;
			}
		}
		XMLHttpRequestObject.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
		XMLHttpRequestObject.send(parameters);
	}
}