$("#ContentPlaceHolder1_ddl_Ana").change(function () {
var v = $("[id$=ContentPlaceHolder1_ddl_Ana] option:selected").val();
// $('[id$=txt_r3_muellif]').autocomplete('Suggest.ashx?t=Ogrenciler&k=Muellifi&B=' + v + '&s=m');
var ana = ($("#ContentPlaceHolder1_ddl_Ana").val());
console.log(v);
$("[id*='txt_H']").autocomplete('destroy');
$("[id*='txt_H']").removeData('autocomplete');
$("[id*='txt_H']").unautocomplete();
$("[id*='txt_H']").autocomplete('Suggest.ashx?t=listeden&p=' + v + '');
});