function Validar(form)
{
   
   if (form.email.value == "")
   { alert("Invalid e-mail"); form.email.focus(); return; }
   
   if (form.email.value.indexOf('@', 0) == -1 ||
      form.email.value.indexOf('.', 0) == -1)
   { alert("Invalid e-mail"); form.email.focus(); return; }
   
   if (form.username.value == "")
   { alert("Invalid Username"); form.username.focus(); return; }
   
   if (form.member.value == "")
   { alert("Invalid Member ID."); form.member.focus(); return; }
			
    form.submit();

}

function Validar2(form)
{
   
   if (form.email.value == "")
   { alert("Invalid e-mail"); form.email.focus(); return; }
   
   if (form.email.value.indexOf('@', 0) == -1 ||
      form.email.value.indexOf('.', 0) == -1)
   { alert("Invalid e-mail"); form.email.focus(); return; }
   
   if (form.username.value == "")
   { alert("Invalid Username"); form.username.focus(); return; }
			
    form.submit();

}

// ajax
var tb_pathToImage = "images/download_loader.gif";
function creaAjax(){
         var objetoAjax=false;
         try {
          /*Para navegadores distintos a internet explorer*/
          objetoAjax = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
          try {
                   /*Para explorer*/
                   objetoAjax = new ActiveXObject("Microsoft.XMLHTTP");
                   }
                   catch (E) {
                   objetoAjax = false;
          }
         }

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

function FAjax (url,capa,valores,metodo)
{
          var ajax=creaAjax();
          var capaContenedora = document.getElementById(capa);

if(metodo.toUpperCase()=='POST'){
         ajax.open ('POST', url, true);
         ajax.onreadystatechange = function() {
         if (ajax.readyState==1) {
                          capaContenedora.innerHTML="<div class='f4'><img src='"+tb_pathToImage+"' /></div>";
         }
         else if (ajax.readyState==4){
                   if(ajax.status==200)
                   {
                        document.getElementById(capa).innerHTML=ajax.responseText;
                   }
                   else if(ajax.status==404)
                                             {

                            capaContenedora.innerHTML = "La direccion no existe";
                                             }
                           else
                                             {
                            capaContenedora.innerHTML = "Error: ".ajax.status;
                                             }
                                    }
                  }
         ajax.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
         ajax.send(valores);
         return;
}
if (metodo.toUpperCase()=='GET'){

         ajax.open ('GET', url, true);
         ajax.onreadystatechange = function() {
         if (ajax.readyState==1) {
                                      capaContenedora.innerHTML="<div><img src='"+tb_pathToImage+"' /></div>";
         }
         else if (ajax.readyState==4){
                   if(ajax.status==200){
                                             document.getElementById(capa).innerHTML=ajax.responseText;
                   }
                   else if(ajax.status==404)
                                             {

                            capaContenedora.innerHTML = "La direccion no existe";
                                             }
                                             else
                                             {
                            capaContenedora.innerHTML = "Error: ".ajax.status;
                                             }
                                    }
                  }
         ajax.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
         ajax.send(null);
         return
}
}