AJAX无刷新搜索,即输即得(未完善…)

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GOOGLE.HTM 代码(JAVASCRITP+XMLHTTP)--存在中文乱码问题:
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>google.htm</title>
<link href="style.css" rel="stylesheet" type="text/css">

<script language="JavaScript" type="text/JavaScript">
<!--
var req=false; //定义全局变量(将被作为XMLHTTP)

//主执行函数,请求
function func(startindex) //分页参数,0-1页 10-2页……
{
var p;
var url;
p=google.value;
url="http://www.google.com/custom?hl=zh-CN&inlang=zh-CN&ie=GB2312&oe=GB2312&newwindow=1&client=pub-8331935212574359&domains=www.vpart.net&q="+p+"&start="+startindex
req=false;
req=new ActiveXObject("Microsoft.XMLHTTP");
req.onreadystatechange=ajax; //设置获得响应后将触发的函数名
req.open("GET",url,true);
req.send();
other(1);
}

//获得响应触发的函数
function ajax()
{
if (req.readystate==4)
 {
 if (req.status==200)
  {
  var str;
  str=req.responseText;
  str=str.slice(str.indexOf("<div><p class=g>"),str.indexOf("<div class=n><table")) //截取字符串,只要查询结果
   if (str=="")
 {
 str="<br>查询结果为空";
 }
   searchresult.innerHTML=str;
   other(0);
  }
  else
  {
  alert('请求中出现问题.');
  }
 }
}

//伴随主函数同时响应的附加函数
function other(stat)
{
 var msg;

 if (stat==1)
 {
 msg="正在进行关键字<font color=red>"+google.value+"</font>的查询……";
 }
 if (stat==0)
 {
 msg="关键字<font color=red>"+google.value+"</font>的查询完成";
 }
 pagelayer.style.display="block";
 msglayer.innerHTML=msg ;
}

//-->
//http://www.google.com/custom?hl=zh-CN&inlang=zh-CN&ie=GB2312&oe=GB2312&newwindow=1&client=pub-8331935212574359&domains=vvwv.vpart.net&q=a&start=20
</script>
</head>
<body leftmargin="100" topmargin="10">
<div id="msglayer"></div>
输入查询关键字:<input id="google" type="text" onKeyUp="func(0)">
<div id="pagelayer" style="display:none">
<a href="#" onClick="func(0)">1</a>&nbsp;
<a href="#" onClick="func(10)">2</a>&nbsp;
<a href="#" onClick="func(20)">3</a>&nbsp;
<a href="#" onClick="func(30)">4</a>&nbsp;
<a href="#" onClick="func(40)">5</a>&nbsp;
<a href="#" onClick="func(50)">6</a>&nbsp;
<a href="#" onClick="func(60)">7</a>&nbsp;
<a href="#" onClick="func(70)">8</a>&nbsp;
<a href="#" onClick="func(80)">9</a>&nbsp;
<a href="#" onClick="func(90)">10</a>&nbsp;
</div>
<div id="searchresult"></div>
</body>
</html>

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VBS+XMLHTTP --解决了中文乱码的问题,但又存在获得数据后不直接响应问题(J+X中不存在这个问题),即数据已经得到,但是没有立即在DIV中出现,而需要进行第2次相同关键字的搜索时才出现,初步估计是由于VBS中没有使用XMLHTTP的onreadystatechange属性导致的,直接像JS那样使用又会出错,再研究研究……:
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>google.htm</title>
<link href="style.css" rel="stylesheet" type="text/css">

<script language=VBScript>

dim req

Function func(startindex)

dim p
dim url
p=google.value
url="http://www.google.com/custom?hl=zh-CN&inlang=zh-CN&ie=GB2312&oe=GB2312&newwindow=1&client=pub-8331935212574359&domains=www.vpart.net&q="&p&"&start="&startindex
req=false
set req = CreateObject("Microsoft.XMLHTTP")
//req.onreadystatechange=ajax
req.open "GET",url,true
req.send

other(1)
ajax()
other(0)

End Function


Function ajax()

if req.readystate=4 then
 if req.status=200 then
   dim str
   dim s
 dim e
 str=bytes2BSTR(req.responseBody)
 s=instr(1,str,"<div><p class=g>")
 if s>0 then
 e=instr(1,str,"<div class=n><table")
  if e-s>0 then
  str=mid(str,s,e-s)
  end if
 else
 str="<br>查询结果为空"
 end if
 searchresult.innerHTML=str
   else
   msgbox "请求中出现问题。"
   End if
End if

End Function


Function other(stat)

 dim msg

 if stat=1 then
 
 msg="正在进行关键字<font color=red>"+google.value+"</font>的查询……"
 end if
 if stat=0 then
  msg="关键字<font color=red>"+google.value+"</font>的查询完成"
 end if
 pagelayer.style.display="block"
 msglayer.innerHTML=msg

End Function

Function bytes2BSTR(vIn)
    strReturn = ""
    For i = 1 To LenB(vIn)
        ThisCharCode = AscB(MidB(vIn,i,1))
        If ThisCharCode < &H80 Then
            strReturn = strReturn & Chr(ThisCharCode)
        Else
            NextCharCode = AscB(MidB(vIn,i+1,1))
            strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode))
            i = i + 1
        End If
    Next
    bytes2BSTR = strReturn
End Function

 

</script>
</head>
<body leftmargin="100" topmargin="10">
<div id="msglayer"></div>
输入查询关键字:<input id="google" type="text" onKeyUp="func(0)">

<div id="pagelayer" style="display:none">
<a href="#" onClick="func(0)">1</a>&nbsp;
<a href="#" onClick="func(10)">2</a>&nbsp;
<a href="#" onClick="func(20)">3</a>&nbsp;
<a href="#" onClick="func(30)">4</a>&nbsp;
<a href="#" onClick="func(40)">5</a>&nbsp;
<a href="#" onClick="func(50)">6</a>&nbsp;
<a href="#" onClick="func(60)">7</a>&nbsp;
<a href="#" onClick="func(70)">8</a>&nbsp;
<a href="#" onClick="func(80)">9</a>&nbsp;
<a href="#" onClick="func(90)">10</a>&nbsp;
</div>
<div id="searchresult"></div>
</body>
</html>
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