javascript 应用小技巧方法汇总(6)

<SCRIPT language="VBScript"> Function URLEncoding(vstrIn)
    strReturn = ""
    For i = 1 To Len(vstrIn)         ThisChr = Mid(vStrIn,i,1)
        If Abs(Asc(ThisChr)) < &HFF Then
            strReturn = strReturn & ThisChr         Else
            innerCode = Asc(ThisChr)
            If innerCode < 0 Then
                innerCode = innerCode + &H10000             End If
            Hight8 = (innerCode  And &HFF00)\ &HFF
            Low8 = innerCode And &HFF
            strReturn = strReturn & "%" & Hex(Hight8) &  "%" & Hex(Low8)         End If
    Next     URLEncoding = strReturn 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 dim strA,oReq
strA = URLEncoding("submit1=Submit&text1=中文")
set oReq = CreateObject("MSXML2.XMLHTTP") oReq.open "POST","",false oReq.setRequestHeader "Content-Length",Len(strA)
oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"
oReq.send strA msgbox bytes2BSTR(oReq.responseBody) </SCRIPT>

//readyState是xmlhttp返回数据的进度，0=载入中,1=未初始化,2=已载入,3=运行中,4=完成

//组件是否安装
isComponentInstalled("{6B053A4B-A7EC-4D3D-4567-B8FF8A1A5739}", "componentID"))

//检查网页是否存在

复制代码 代码如下:

function CheckURL(URL) {   var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");   xmlhttp.Open("GET",URL, false);   try   { 
    xmlhttp.Send();      var result = xmlhttp.status;   }   catch(e) {return(false); }   if(result==200)   {      return true;
  }   xmlhttp = null;   return false;
}

//连接数据库

复制代码 代码如下:

<script language="javascript">   //用 JavaScript 写服务器端连接数据库的代码示例   var conn = new ActiveXObject("ADODB.Connection");   conn.Open("Provider=SQLOLEDB.1; Data Source=localhost; User ID=sa; "
    +"Password=; Initial Catalog=pubs");
  var rs = new ActiveXObject("ADODB.Recordset");   var sql="select * from authors";   rs.open(sql, conn);
shtml = "<table border=1>";
shtml +="<tr bgcolor='#f4f4f4'><td>au_id</td><td>au_lname</td><td>au_fname</td><td>phone</td><td>address</td><td> city</td><td>state</td><td>zip</td></tr>";
  while(!rs.EOF)   {
shtml += "<tr><td>" + rs("au_id") + "</td><td>" + rs("au_lname") + "</td><td>" + rs("au_fname") + "</td><td>" + rs("phone") + "</td><td>" + rs("address") + "</td><td>" + rs("city") + "</td><td>" + rs("state") + "</td><td>" + rs("zip") + "</td></tr>"; rs.moveNext;
  }   shtml += "</table>";
  document.write(shtml);   rs.close();    rs = null;    conn.close();    conn = null; </script>

//使用数据岛

复制代码 代码如下: