window.onload = function() {
    var pulsaciones = 4;
    new Ajax.Autocompleter("searchBox", "suggestDiv", "Suggest.do", {
              paramName: "text", 
              minChars: pulsaciones,
              updateElement: doNothing,
              parameters: 'language='+document.searchForm.language.value
            });
}

function doNothing(){}