ajax模拟关键字智能匹配搜索效果

准备数据keyword.json：（这里只贴出部分数据）

[
  {"id":1,"initial":"ad","keyword":"奥迪"},
  {"id":2,"initial":"ada4l","keyword":"奥迪A4L"},
  {"id":3,"initial":"ada6l","keyword":"奥迪A6L"},
  {"id":4,"initial":"adq5","keyword":"奥迪Q5"},
  {"id":5,"initial":"ada3","keyword":"奥迪A3"},
  {"id":6,"initial":"adq7","keyword":"奥迪Q7(进口)"},
  {"id":7,"initial":"ada8","keyword":"奥迪A8L(进口)"},
  {"id":8,"initial":"bm","keyword":"宝马"},
  {"id":9,"initial":"bm5x","keyword":"宝马5系"},
  {"id":10,"initial":"bm7x","keyword":"宝马7系"},
  {"id":11,"initial":"bt","keyword":"本田"},
  {"id":12,"initial":"bqsbx25","keyword":"北汽绅宝 X25"},
  {"id":13,"initial":"bqsbx35","keyword":"北汽绅宝X35"},
  {"id":14,"initial":"bqsbx55","keyword":"北汽绅宝X55"}
]

html结构

<form class="fl search_form" action="#" method="post">
    <input class="search_text" id="searchKey" type="search" placeholder="请输入搜索关键字" οnkeyup="searchSuggest(this);"/>
    <input class="search_btn" type="submit" value="搜索"/>
</form>
<!--start--智能搜索关键字匹配弹出层-->
<ul class="keywords_list"></ul>
<!--end--智能搜索关键字匹配弹出层-->

js：

//当在搜索框输入内容时，根据关键字匹配，显示弹出层
function searchSuggest(obj){ 
  var searchKey=$(obj).val();  
  var reg = new RegExp(searchKey,"i"); //忽略大小写匹配搜索框中输入的内容
  $.ajax({
    type:"get",
    url:"data/keyword.json",
    dataType:"json",
    success:function(data){
      var arr=[];
      for(var i=0,len=data.length;i<len;i++){
        if(searchKey!="" && (data[i].initial.search(reg)!=-1 || data[i].keyword.search(reg)!=-1))  {
      	   arr.push("<li οnclick='changeSearchKey(this);'>"+data[i].keyword+"</li>"); 
        }
      }     	  	  
      $(".keywords_list").html(arr).show();
    }
  });
}
//单击匹配列表中的关键字选项时，将该关键字显示在搜索框中
function changeSearchKey(obj){
   var value=$(obj).text();
  $("#searchKey").val(value);
  $('.keywords_list').hide(); 
}

效果图：