function toggleDisplay(objeto) {  
	var objVisible = document.getElementById(objeto);
	var estVisible = objVisible.style.display;	
	if (estVisible == "none") {
		objVisible.style.display = "block";
	} else {
		objVisible.style.display = "none";
	}	
}

/* AJAX */
var xmlhttp=false;
if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
 	try {
 		 xmlhttp = new XMLHttpRequest();
 	} catch (e) {
 		 xmlhttp=false;
 	}
}

/*@cc_on @*/
/*@if (@_jscript_version >= 5)
if (!xmlhttp){
 try {
  xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
 } catch (e) {
  try {
   xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  } catch (E) {
   xmlhttp = false;
  }
 }
}
@end @*/


function creaAjax(){
         var objetoAjax=false;
         try {
          /*OTROS NAVEGADORES INTERNET*/
          objetoAjax = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
          try {
                   /*EXPLORER*/
                   objetoAjax = new ActiveXObject("Microsoft.XMLHTTP");
                   }
                   catch (E) {
                   objetoAjax = false;
          }
         }

         if (!objetoAjax && typeof XMLHttpRequest!='undefined') {
          objetoAjax = new XMLHttpRequest();
         }
         return objetoAjax;
}

var please_wait = "<table><tr><td align='center' valign='middle' class='texto'><b>Cargando...</b></td></tr></table>";


function ajax(url, targetId) {
  if(!xmlhttp)return false;
    var e=document.getElementById(targetId);if(!e)return false;
    if(please_wait)e.innerHTML = please_wait;
    xmlhttp.open("GET", url, true);

    xmlhttp.onreadystatechange = function() { response(url, e); }
	try{

      xmlhttp.send(null);
    }catch(l){
    while(e.firstChild)e.removeChild(e.firstChild);//e.innerHTML="" the standard way
    e.appendChild(document.createTextNode("request failed"));
  }
}


function response(url, e) {
  if(xmlhttp.readyState != 4)return;
    var tmp= (xmlhttp.status == 200 || xmlhttp.status == 0) ? xmlhttp.responseText : "<table width='90%' height=''><tr><td align='center' valign='middle'>No se encuentra la pagina solicitada</td></tr><tr><td align='center' valign='middle'>" + xmlhttp.status+" "+xmlhttp.statusText+"</td></tr></table>";
    var d=document.createElement("div");
    d.innerHTML=tmp;
	setTimeout(function(){
	while(e.firstChild)e.removeChild(e.firstChild);
	e.appendChild(d);},10);
	
}