Ajax实现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" onkeyup="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 onclick='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：

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