Kotak input Baidu tiruan JavaScript menggesa kemahiran completion_javascript drop-down automatik-tutorial js-php.cn

Kotak input Baidu tiruan JavaScript menggesa kemahiran completion_javascript drop-down automatik

WBOY

Lepaskan： 2016-05-16 15:21:05

asal

1125 orang telah melayarinya

Contoh dalam artikel ini menerangkan operasi penyiapan tarik turun automatik kotak input JavaScript, meniru gesaan kotak carian Baidu dan Google Kandungan khusus adalah seperti berikut

Rendering:

Kod khusus:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
 <TITLE> New Document </TITLE>
 <META NAME="Generator" CONTENT="EditPlus">
 <META NAME="Author" CONTENT="">
 <META NAME="Keywords" CONTENT="">
 <META NAME="Description" CONTENT="">
 <script type="text/javascript" src="jquery.js"></script>
  <script type="text/javascript">
  /*自动下拉补全 zhk */
  var highlightindex=-1;//当前高亮的节点
 $(document).ready(function(){
 var wordInput=$("#word");
 var wordInputOffset=wordInput.offset();
 
  $("#auto").hide().css("border","1px black solid").css("position","absolute")
  .css("top",wordInputOffset.top+wordInput.height()+5+"px")
  .css("left",wordInputOffset.left+"px").width(wordInput.width()+2);
 
 wordInput.keyup(function (event){
 
  var myEvent=event||window.event;
  var keyCode=myEvent.keyCode;
  if(keyCode>=65&&keyCode<=90||keyCode==8||keyCode==46){
 
   var wordText=$("#word").val();
   var autoNode=$("#auto");
   if(wordText!=""){
   
    
    var wordNodes=$("span");
    
    autoNode.html("");
    wordNodes.each(function(i){
     var wordNode=$(this);
     var newDivNode=$("<div>").attr("id",i);
      
     newDivNode.html(wordNode.text()).appendTo(autoNode);
     newDivNode.mouseover(function(){//鼠标进入
      if(highlightindex!=-1){
        $("#auto").children("div").eq(highlightindex)
        .css("background-color","white");
       }
       highlightindex=$(this).attr("id");
       $(this).css("background-color","red");
      })
 
      newDivNode.mouseout(function(){//鼠标移除
       $(this).css("background-color","white");
      
       })
newDivNode.click(function(){//点击
       var comText=$(this).text();
       $("#auto").hide();
     highlightindex=-1;
     $("#word").val(comText);
       })
 
    })
    if(wordNodes.length>0){
     autoNode.show();
    }else{
     autoNode.hide();
     highlightindex=-1;
     }
   
   }else{
   autoNode.hide();
    highlightindex=-1;
    }
 
   }else if(keyCode==38||keyCode==40){
     if(keyCode==38){//向上
      var autoNodes=$("#auto").children("div");
       if(highlightindex!=-1){
        autoNodes.eq(highlightindex).css("background-color","white");
         highlightindex--;
       }else{
        highlightindex=autoNodes.length-1;
       }
       
       if(highlightindex==-1){
        highlightindex=autoNodes.length-1;
       }
       autoNodes.eq(highlightindex).css("background-color","red");
     }
     if(keyCode==40){
      var autoNodes=$("#auto").children("div");
       if(highlightindex!=-1){
        autoNodes.eq(highlightindex).css("background-color","white");
       }
       highlightindex++;
       if(highlightindex==autoNodes.length){
        highlightindex=0;
       }
       autoNodes.eq(highlightindex).css("background-color","red");
     }
   }else if(keyCode==13){
     
    if(highlightindex!=-1){
     var comText=$("#auto").hide().children("div").eq(highlightindex).text();
     highlightindex=-1;
     $("#word").val(comText);
     }else{
      alert("文本框中的【"+$("#word").val()+"】被提交了");
      $("#auto").hide();
       $("#word").get(0).blur();//失去焦点
     }
    }
  });
 
  $("input [type='button']").click(function(){
   alert("文本框中的【"+$("#word").val()+"】被提交了");
  });
 
 
})
</script>
 </HEAD>
 
 <BODY>
 <input type="text" id="word">
<input type="button" value="提交">
<div id="auto"></div>
<p>
<span>aaa</span>
<span>abc</span>
<span>abd</span>
<span>bbc</span>
<span>beb</span>
<span>cer</span>
<span>erd</span>
<span>beg</span>
<p>
 </BODY>
</HTML>

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Di atas adalah keseluruhan kandungan artikel ini saya harap ia akan membantu semua orang dalam mempelajari pengaturcaraan javascript.