jquery multi autocomplete with remote source, showing the results on focus -

i'd wrap standard jquery ui autocomplete jquery plugin multi-value autocomplete. works good, except 1 small thing. i'd show suggestions on focus. how should modify code?

(function ($) {     $.fn.myautocomplete = function (options) {         var defaults = {             source: null,             minlength: 0,             separator: ", "         };          var o = {};         $.extend(o, defaults, options);          var split = function(val) { return val.split(/,\s*/); };         var extractlast = function(term) { return split(term).pop(); };          if (o.source == null) return this;          return this.each(function () {             $(this).autocomplete({                 source: function(request, response) {                     $.ajax({                         url: o.source,                         data: { term: extractlast(request.term) },                         success: function(data) {                             response($.map(data, function(item) {                                 return { label: item.name };                             }));                         }                     });                 },                 search: function() {                     return extractlast(this.value).length > o.minlength;                 },                 focus: function() {                          //$(this).trigger('keydown.autocomplete');                         $(this).data("autocomplete").search($(this).val());                     //return false;                 },                 select: function(event, ui) {                     var terms = split(this.value);                     terms.pop();                     terms.push(ui.item.label);                     terms.push("");                     this.value = terms.join(o.separator);                     return false;                 }             });         });     }; })(jquery); 

i've tried see inside focus handler.

this helped me:

    var showsuggestions = function() {         var searchstring = extractlast(this.value);         if (searchstring.trim().length == 0) {             searchstring = "[getall]";         }          $(this).autocomplete("search", searchstring);     };      $(this).focus(showsuggestions).click(showsuggestions); 

and on sever checking if [getall] consider empty string