[A bit Off-Topic]... problems with js and dojo syntax.

[Dudu]

I'm sorry. I have posted in many js groups, but no answer...

I have a js object, and I need to return de data handled by the ajax
request...see on the green comment

dojo.declare("util", null, {
   evalOnBlur: function(id) {
       eval(dojo.byId(id).attributes['onBlur'].value);
   },
   getNomeComponente: function(expr) {
       return expr.substring(3, 11).toUpperCase();
   },
   getValor: function(expr) {
           var retorno = null;
           var bindArgs = {
           url:        'execexit',
           content : { method : 'execsql',
                       sql : 'select 10 as coisa from
pocaauxi'
                       },
           mimetype:   "text/json",
           error:      function(type, errObj){
                           alert("Erro ao fazer request, tente novamente em
"
                               + "alguns minutos. " + errObj);
                           retorno = 'erro';
                           alert(retorno);
                       },
           load:       function(type, data, evt){
                           retorno = data.colunas;
                           alert(retorno);
                           //I tried return here too
                       }
           };
           var requestObj = dojo.io.bind(bindArgs);
           requestObj.load();
           alert(retorno);
           return retorno; //return always nulll :(
   }
});

This is a class to handle the ajax requests, i need to call this function in
other part of code, and get only the number value returned.

Thanks all.