function Ajax(){
	var xmlhttp=false;
	try{
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	}catch(e){
		try {
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		}catch(E){
			xmlhttp = false;
		}
	}
	if (!xmlhttp && typeof XMLHttpRequest!='undefined'){
		xmlhttp = new XMLHttpRequest();
	}
	return xmlhttp;
}

function resolver(opcion){
	if(opcion == "uge"){
		padre = document.getElementById('sel_reg').value;
		ajax=Ajax();
		ajax.open("GET", "sel_uge.php?campo="+padre);
		ajax.onreadystatechange=function(){
			if (ajax.readyState==4){
				document.getElementById('uge').innerHTML = ajax.responseText;
			}
		}
	}
	if(opcion == "file"){
		padre = document.getElementById('sel_uge').value;
		ajax=Ajax();
		ajax.open("GET", "out_file.php?campo="+padre);
		ajax.onreadystatechange=function(){
			if (ajax.readyState==4){
				document.getElementById('file').innerHTML = ajax.responseText;
			}
		}
	}
	ajax.send(null);
}