使用JS和jQuery实现自动填充input字段

 var usernameArray=[];  
      var tval="";
     $(document).ready(function(){   
                //文本框不缓存  
            //    $.fn.mtea.setInputTxtCache(["#username"],false);  
            
            
                  $("#suggest1").autocomplete(cities);
                  
                $("#username").keyup(function(){  
                dwr.engine.setAsync(false);
                tval=$(this).val();
                dwrServices.getChildComMap($(this).val(), function(data){
                //遍历,组装结果  
                       usernameArray=[];
                         for(x in data){
                          var obk = new Object();
     obk.name = data[x];
     obk.to = x;
                 usernameArray.push(obk);
              }
    });
    // $("#username").autocomplete(cities);
     $("#username").autocomplete(usernameArray, {
minChars: 0,
width: 310,
matchContains: true,
autoFill: false,
formatItem: function(row, i, max) {
return i + "/" + max + ": \"" + row.name + "\" [" + row.to + "]";