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JS implementation method to imitate Google and Baidu search box input information intelligent prompts_javascript skills

WBOYOriginal: 2016-05-16 16:03:042296browse

The example in this article describes the implementation method of JS to implement intelligent prompts for input information imitating Google and Baidu search boxes. Share it with everyone for your reference. The details are as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
 <title>仿google、百度搜索框输入信息智能提示的实现</title>
 <style type="text/css" media="screen">
  body
  {
   font: 11px arial;
  }
  .suggest_link
  {
   width:120px;
   background-color: #FFFFFF;
   padding: 2px 6px 2px 6px;
  }
  .suggest_link_over
  {
   width:120px;
   background-color: #E8F2FE;
   padding: 2px 6px 2px 6px;
  }
  #suggestResult
  {
   position: absolute;
   background-color: #FFFFFF;
   text-align: left;
   border: 1px solid #000000;
  }
  /*input*/
  .input_on
  {
   padding: 2px 8px 0pt 3px;
   height: 18px;
   border: 1px solid #999;
   background-color: #FFFFCC;
  }
  .input_off
  {
   padding: 2px 8px 0pt 3px;
   height: 18px;
   border: 1px solid #CCC;
   background-color: #FFF;
  }
  .input_move
  {
   padding: 2px 8px 0pt 3px;
   height: 18px;
   border: 1px solid #999;
   background-color: #FFFFCC;
  }
  .input_out
  {
   /*height:16px;默认高度*/
   padding: 2px 8px 0pt 3px;
   height: 18px;
   border: 1px solid #CCC;
   background-color: #FFF;
  }
 </style>
 <script language="javascript" type="text/javascript">
  var $ = document.getElementById;
  //创建XMLHttpRequest对象  
  function createXMLHttpRequest() {
   var obj;
   if (window.XMLHttpRequest) { //Mozilla 浏览器
    obj = new XMLHttpRequest();
   }
   else if (window.ActiveXObject) { // IE浏览器
    try {
     obj = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
     try {
      obj = new ActiveXObject("Microsoft.XMLHTTP");
     } catch (e) { }
    }
   }
   return obj;
  }
  //当输入框的内容变化时，调用该函数
  function searchSuggest() {
   var inputField = $("txtSearch");
   var suggestText = $("suggestResult");
   if (inputField.value.length > 0) {
    var o = createXMLHttpRequest();
    var url = "SearchResult.ashx&#63;searchText=" + escape(inputField.value);
    o.open("GET", url, true);
    o.onreadystatechange = function () {
     if (o.readyState == 4) {
      if (o.status == 200) {
       var sourceItems = o.responseText.split("\n");
       if (sourceItems.length > 1) {
        suggestText.style.display = "";
        suggestText.innerHTML = "";
        for (var i = 0; i < sourceItems.length - 1; i++) {
         var sourceText = sourceItems[i].split("@")[1];
         var sourceValue = sourceItems[i].split("@")[0];
         var s = "<div onmouseover=\"javascript:suggestOver(this);\" ";
         s += " onmouseout=\"javascript:suggestOut(this);\" ";
         s += " onclick=\"javascript:setSearch('" + sourceText + "','" + sourceValue + "');\" ";
         s += " class=\"suggest_link\" >" + sourceText + "</div>";
         suggestText.innerHTML += s;
        }
       }
       else {
        suggestText.style.display = "none";
       }
      }
     }
    }; //指定响应函数
    o.send(null); // 发送请求
   }
   else {
    suggestText.style.display = "none";
   }
  }
  function delayExecute() {
   $("valueResult").value = "";
   window.setTimeout(function () { searchSuggest() }, 800);
   //延时处理
  }
  function suggestOver(div_value) {
   div_value.className = "suggest_link_over";
  }
  function suggestOut(div_value) {
   div_value.className = "suggest_link";
  }
  function setSearch(a, b) {
   $("txtSearch").value = a;
   $("valueResult").value = b;
   var div = $("suggestResult");
   div.innerHTML = "";
   div.style.display = "none";
  }
  function showResult() {
   alert($("txtSearch").value + $("valueResult").value);
  }
 </script>
</head>
<body>
 <form id="form1" action="">
 <input type="text" id="txtSearch" name="txtSearch" onkeyup="delayExecute();" size="20"
  class="input_out" onfocus="this.className='input_on';this.onmouseout=''"
  onblur="this.className='input_off';this.onmouseout=function(){this.className='input_out'};"
  onmousemove="this.className='input_move'" onmouseout="this.className='input_out'" />
 <input type="hidden" id="valueResult" name="valueResult" value="" />
 <br />
 <div id="suggestResult" style="display: none">
 </div>
 <br/>
 <input id="button1" type="button" value="提交" onclick="showResult();" />
 </form>
</body>
</html>

Server-side C# code

<%@ WebHandler Language="C#" Class="SearchResult" %>
using System;
using System.Web;
using System.Data;
public class SearchResult : IHttpHandler {
 public void ProcessRequest (HttpContext context) {
  object QueryWord=context.Request.QueryString["searchText"];
  if (QueryWord != null)
  {
   if (QueryWord.ToString().Trim().Length > 0)
   {
    DataTable dt = getDB();
    string returnText = "";
    if (dt != null && dt.Rows.Count > 0)
    {
     DataRow[] dr = dt.Select(" name like '%" + QueryWord .ToString()+ "%' ");
     if (dr.Length > 0)
     {
      for (int i = 0; i < dr.Length; i++)
      {
       //可设置返回多字符串
       returnText += dr[i]["id"].ToString() + "@" + dr[i]["name"].ToString() + "\n";
      }
     }
    }
    context.Response.Write(returnText);
    context.Response.End();
   }
  }  
 }
 public bool IsReusable {
  get {
   return false;
  }
 }
 /// <summary>
 /// 获取数据源的方法
 /// </summary>
 /// <returns>数据源</returns>
 private DataTable getDB()
 {
  DataTable dt = new DataTable();
  dt.Columns.Add("id");
  dt.Columns.Add("name");
  dt.Columns.Add("age");
  dt.Rows.Add(new object[] { "000001", "张三", "26" });
  dt.Rows.Add(new object[] { "000002", "张晓", "26" });
  dt.Rows.Add(new object[] { "000003", "张岚", "27" });
  dt.Rows.Add(new object[] { "000004", "李四", "25" });
  dt.Rows.Add(new object[] { "000005", "李星", "27" });
  return dt;
 }
}

I hope this article will be helpful to everyone’s JavaScript programming design.

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