Ajax实现模拟关键字智能匹配搜索效果的教程

[

 {"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"}

]

<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-->

//当在搜索框输入内容时，根据关键字匹配，显示弹出层

functionsearchSuggest(obj){

 varsearchKey=$(obj).val();

 varreg =newRegExp(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){

  vararr=[];

  for(vari=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

functionchangeSearchKey(obj){

 varvalue=$(obj).text();

 $("#searchKey").val(value);

 $('.keywords_list').hide();

}