function getIEVersionNumber() {
    var ua = navigator.userAgent;
    var MSIEOffset = ua.indexOf("MSIE ");
    if (MSIEOffset == -1) {
        return 0;
    } else {
        return parseFloat(ua.substring(MSIEOffset + 5, ua.indexOf(";", MSIEOffset)));
    }
}

function getElmById(aID)
{
      var rv = null;
      var isIE5Min = getIEVersionNumber();
      var isNetscape4 = false;
      if (isIE5Min >= 7 || isIE5Min == 0)
        rv = document.getElementById(aID)
      else if (isNetscape4)
        rv = document.layers[aID]
      else if (isIE5Min >= 1 && isIE5Min <= 6)
        rv = document.all[aID];
      return rv;
}
function loadweb (xmlobj, div)
{
	if (xmlobj.readyState == 1) document.getElementById (div).innerHTML = "Cargando... <img src='http://intra.upsa.edu.bo/images//progindicator.gif' alt='Cargando...' />";
    if (xmlobj.readyState == 4 && (xmlobj.status == 200 || window.location.href.indexOf ("http") == - 1))
    document.getElementById (div).innerHTML = xmlobj.responseText;
}

function loadwebeditor (xmlobj, div, type)
{
	if (xmlobj.readyState == 1) document.getElementById (div).innerHTML = "Cargando... <img src='http://intra.upsa.edu.bo/images//progindicator.gif' alt='Cargando...' />";
    if (xmlobj.readyState == 4 && (xmlobj.status == 200 || window.location.href.indexOf ("http") == - 1)){
       document.getElementById (div).innerHTML = xmlobj.responseText;
       if (type == 1){
                   __init_lightededitor();
           }else{
                   __init_advancededitor();
       }
    }
}

function loadwebform (xmlobj, div)
{
	if (xmlobj.readyState == 1) document.getElementById (div).innerHTML = "Cargando... <img src='http://intra.upsa.edu.bo/images//progindicator.gif' alt='Cargando...' />";
    if (xmlobj.readyState == 4 && (xmlobj.status == 200 || window.location.href.indexOf ("http") == - 1))
    document.getElementById (div).innerHTML = unescape(xmlobj.responseText)
}

function loadwebmenu(xmlobj, div, canstart)
{
	if (xmlobj.readyState == 1) document.getElementById (div).innerHTML = "Cargando... <img src='http://intra.upsa.edu.bo/images//progindicator.gif' alt='Cargando...' />";
    if (xmlobj.readyState == 4 && (xmlobj.status == 200 || window.location.href.indexOf ("http") == - 1)){
    document.getElementById (div).innerHTML = xmlobj.responseText;
    if (canstart) menustart();
    }
}

function ajax_setlocalizacion(php,param,label,div)
{
    var url = "http://intra.upsa.edu.bo/librerias//lib_location.php";
	var params = "?mainurl=" + php + param;
	    params = params + "&label=" + label;
	    params = params + "&div=" + div;
	do_ajax(url,params,'localizacion');
}

function do_ajax(php, param, div)
{
    var pagina_requerida = false;
	var url = php;
	url=url+param;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); }
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function do_ajax_form(formid,div)
{
    var pagina_requerida = false;
    var Formulario = getElmById(formid);
    var longitudFormulario = Formulario.elements.length;
    var cadenaFormulario = "";
    var sepCampos = "";
    var valor = "";
    var url = "http://intra.upsa.edu.bo/librerias/modbd.php";
    for (var i=0; i < longitudFormulario; i++)
            {
            	
					if (Formulario.elements[i].tagName == "SELECT")
                    {
                        for (y=0; y < Formulario.elements[i].options.length; y++)
                            {
                                if (Formulario.elements[i].options[y].selected)
                                    {
                                    cadenaFormulario += Formulario.elements[i].name +"="+escape(Formulario.elements[i].options[y].value)+"&";
                                    }
                            }
                    }            	
            	    else
                    {
                    if (Formulario.elements[i].type=='checkbox' || Formulario.elements[i].type=='radio')
                            {
                                    if (Formulario.elements[i].checked == true)
                                        {
                                            cadenaFormulario += Formulario.elements[i].name +"="+escape(Formulario.elements[i].value)+"&";                                            
                                        }
                            }
                    else
                            {
                                cadenaFormulario += Formulario.elements[i].name + "=" + escape(Formulario.elements[i].value) + "&";
                            }
                    }
            }
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    
    pagina_requerida.open ('POST', url, true);
    pagina_requerida.onreadystatechange = function (){ loadwebform (pagina_requerida, div); }
    pagina_requerida.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=ISO-8859-1");
    pagina_requerida.send(cadenaFormulario);
}

function do_ajax_form_direct(web,formid,div)
{
    var pagina_requerida = false;
    var Formulario = getElmById(formid);
    var longitudFormulario = Formulario.elements.length;
    var cadenaFormulario = "";
    var sepCampos = "";
    var valor = "";
    var url = web;
    for (var i=0; i < longitudFormulario; i++)
            {
            	
					if (Formulario.elements[i].tagName == "SELECT")
                    {
                        for (y=0; y < Formulario.elements[i].options.length; y++)
                            {
                                if (Formulario.elements[i].options[y].selected)
                                    {
                                    cadenaFormulario += Formulario.elements[i].name +"="+escape(Formulario.elements[i].options[y].value)+"&";
                                    }
                            }
                    }            	
            	    else
                    {
                    if (Formulario.elements[i].type=='checkbox' || Formulario.elements[i].type=='radio')
                            {
                                    if (Formulario.elements[i].checked == true)
                                        {
                                            cadenaFormulario += Formulario.elements[i].name +"="+escape(Formulario.elements[i].value)+"&";                                            
                                        }
                            }
                    else
                            {
                                cadenaFormulario += Formulario.elements[i].name + "=" + escape(Formulario.elements[i].value) + "&";
                            }
                    }
            }
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    
    pagina_requerida.open ('POST', url, true);
    pagina_requerida.onreadystatechange = function (){ loadwebform (pagina_requerida, div); }
    pagina_requerida.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=ISO-8859-1");
    pagina_requerida.send(cadenaFormulario);
}

function do_ajax_menu(php, param, div)
{
    var pagina_requerida = false;
	var url = php;
	url="http://intra.upsa.edu.bo/formularios//"+url+param;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); }
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function do_ajax_menu_editor(php, param, div, type)
{
    var pagina_requerida = false;
	var url = php;
	url="http://intra.upsa.edu.bo/formularios//"+url+param;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadwebeditor (pagina_requerida, div, type); }
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_domenu(div, canstart)
{
    var pagina_requerida = false;
	var url="http://intra.upsa.edu.bo/html//menu.php";
	var bcanstart = false;
	if (canstart == 1) bcanstart = true;
	                   else
	                   bcanstart = false;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadwebmenu (pagina_requerida, div, bcanstart); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_domenuloged(div,param){
	var pagina_requerida = false;
	var url="http://intra.upsa.edu.bo/html//welcome.h.php";
	url=url+param;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

/*
Functiones Implementadas :
	PUBLICS:
*/

function ajax_botonimpresion(div,dato)
{
    var pagina_requerida = false;
	var url="http://intra.upsa.edu.bo/librerias//lib_impresion.php?cid="+dato;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_changetosem(id,div)
{
    var pagina_requerida = false;
	var url="/help/semestre.php?act=change";
	url = url + "&sem="+id;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_dohome(div,action)
{
    var pagina_requerida = false;
	var url="http://intra.upsa.edu.bo/librerias//lib_login.php?act="+action;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div);  init_tab(); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_navegador(div,action)
{
    var pagina_requerida = false;
	var url="http://intra.upsa.edu.bo/librerias//lib_location.php?act="+action;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_dologin(div)
{
    var usuario  = document.getElementById("usuario").value;
    var password = document.getElementById("password").value;
    var pagina_requerida = false;
    var url="http://intra.upsa.edu.bo/librerias//lib_login.php?act=login";
    url=url+"&user="+usuario;
    url=url+"&pwd="+password;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function do_ajax_test(div)
{
    var usuario  = document.getElementById("email").value;
    var password = document.getElementById("emailpass").value;
    var nombre   = document.getElementById("nombrecompleto").value;
    document.getElementById("email").disabled = true;
    document.getElementById("emailpass").disabled = true;
    document.getElementById("nombrecompleto").disabled = true;
    document.getElementById("pinboton").disabled = true;
    var pagina_requerida = false;
    var url="http://intra.upsa.edu.bo/formularios//forms/testmail.php?subdir=true";
    url=url+"&user="+usuario;
    url=url+"&pwd="+password;
    url=url+"&nombre="+nombre;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    }
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
    document.getElementById("email").disabled = false;
    document.getElementById("emailpass").disabled = false;
    document.getElementById("nombrecompleto").disabled = false;
    document.getElementById("pinboton").disabled = false;
}

function ajax_dolibrerias(div,action)
{
    var pagina_requerida = false;
	var url="http://intra.upsa.edu.bo/librerias//"+action;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_dolibreriaseditor(div,action,type)
{
    var pagina_requerida = false;
	var url="http://intra.upsa.edu.bo/librerias//"+action;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadwebeditor (pagina_requerida, div, type); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_dobrowse(div,site)
{
    var pagina_requerida = false;
    var url="http://intra.upsa.edu.bo/html//"+site;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_docategoria(div,catid)
{
    var pagina_requerida = false;
    var url="http://intra.upsa.edu.bo/html//cat_browser.php?catid="+catid;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_dosearch(div)
{
	var cadena = document.getElementById("searchFor").value;
	document.getElementById("searchFor").value = "";
    var pagina_requerida = false;
 	var url="http://intra.upsa.edu.bo/librerias//lib_search.php?act=search";
  	url=url+"&query="+cadena;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_dosearchv2(div)
{
	var cadena = document.getElementById("searchFor").value;
	document.getElementById("searchFor").value = "";
        var pagina_requerida = false;
 	var url="http://intra.upsa.edu.bo/librerias//lib_search.php?act=search&sem=anteriores";
  	url=url+"&query="+cadena;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_dosearchv3(tipo,label)
{
	var cadena = document.getElementById("searchFor").value;
	document.getElementById("searchFor").value = "Nro. Registro / C.I.";
        do_ajax_menu('intranet.php','?param='+tipo+'&codreg='+cadena,'workspace'); 
        do_ajax_menu('intranet.php','?param=menu_'+tipo,'navegadores'); 
        ajax_setlocalizacion('intranet.php','?param='+tipo,label,'workspace');
}

function ajax_docontablesearch(div)
{
	var cadena = document.getElementById("cadena").value;
	document.getElementById("cadena").value = "";
	var categoria = document.getElementById("busqueda").options[document.getElementById("busqueda").selectedIndex].value;
    var pagina_requerida = false;
 	var url="http://intra.upsa.edu.bo/librerias//lib_search.php?act=contable";
  	url = url + "&query=" + cadena;
	url = url + "&categoria=" + categoria;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_showpais(div,country)
{
    var pagina_requerida = false;
 	var url="http://intra.upsa.edu.bo/librerias//getnations.php?opt=country";
  	url=url+"&query="+country;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_showcartas(div,cartaid)
{
    var pagina_requerida = false;
        var url="http://intra.upsa.edu.bo/formularios/forms/mensajeria.php?subdir=true&opt=carta";
        url=url+"&id="+cartaid;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    }
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadwebeditor (pagina_requerida, div, 2); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_setvalor(valor,div)
{
    var pagina_requerida = false;
 	var url="http://intra.upsa.edu.bo/html//setdato.php?dato="+valor;
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}

function ajax_delvalor(valor,div)
{
    var pagina_requerida = false;
 	var url="http://intra.upsa.edu.bo/html//setdato.php?dato="+valor+"&opt=del";
    if (window.XMLHttpRequest){
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject){
        try { pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP"); }
        catch (e){
            try { pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP"); }
            catch (e){ }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function (){ loadweb (pagina_requerida, div); };
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}