本文介绍了一个简单的网页自动刷新方案，通过VBScript转换字节为BSTR，并利用JavaScript的XMLHttpRequest对象获取并解析本地HTML文件内容，实现页面内容的定时更新。
创建一个222.htm文件，下面就是代码咯,把222.htm文件修改后,这个页面就会变了:
<script language="VBScript" >
Function bytes2BSTR(vIn)
Dim strReturn,i,ThisCharCode,innerCode,Hight8,Low8,NextCharCode
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>
<script language="JavaScript">
function getXML(URL)
{
var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.Open("GET",URL, false);
try
{
xmlhttp.Send();
var result = xmlhttp.status;
}
catch(e)
{
return(false);
}
return(bytes2BSTR(xmlhttp.responseBody));
var xmlhttp = null;
}
function update()
{
try
{
document.body.innerHTML = getXML("222.htm");
}
catch(e)
{
}
}
setInterval("update()",200); //定时刷新
</script>
<html>
<title>xmlhttp</title>
<body>
</body>
</html>
(转自：http://www.cnblogs.com/Ameng/articles/339789.html)
Function bytes2BSTR(vIn)
Dim strReturn,i,ThisCharCode,innerCode,Hight8,Low8,NextCharCode
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>
<script language="JavaScript">
function getXML(URL)
{
var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.Open("GET",URL, false);
try
{
xmlhttp.Send();
var result = xmlhttp.status;
}
catch(e)
{
return(false);
}
return(bytes2BSTR(xmlhttp.responseBody));
var xmlhttp = null;
}
function update()
{
try
{
document.body.innerHTML = getXML("222.htm");
}
catch(e)
{
}
}
setInterval("update()",200); //定时刷新
</script>
<html>
<title>xmlhttp</title>
<body>
</body>
</html>
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