function regresoExitoso(){
}

function regresoError(){
}

function cambiarContenido(urlHtml){
	var postData = "";
	new Ajax.Updater('ifrContenido',urlHtml,{ method:'post' , parameters: postData , onComplete: regresoExitoso, onFailure: regresoError});
	//document.getElementById("ifrContenido").src = urlHtml;
}