Gb2312转utf-8(vbs+js)

昨天看了一下cocoon counter的代码，发现里面是用vbScript转的，费了以上午时间来研究，还是被搞得晕糊糊- -

他的vb转换函数是这样的：

Function DeCodeAnsi(s)
Dim i, sTmp, sResult, sTmp1
sResult = ""
For i=1 To Len(s)
If Mid(s,i,1)="%" Then
sTmp = "&H" & Mid(s,i+1,2)
If isNumeric(sTmp) Then
If CInt(sTmp)=0 Then
i = i + 2
ElseIf CInt(sTmp)>0 And CInt(sTmp)<128 Then
sResult = sResult & Chr(sTmp)
i = i + 2
Else
If Mid(s,i+3,1)="%" Then
sTmp1 = "&H" & Mid(s,i+4,2)
If isNumeric(sTmp1) Then
sResult = sResult & Chr(CInt(sTmp)*16*16 + CInt(sTmp1))
i = i + 5
End If
Else
sResult = sResult & Chr(sTmp)
i = i + 2
End If
End If
Else
sResult = sResult & Mid(s,i,1)
End If
Else
sResult = sResult & Mid(s,i,1)
End If
Next
DeCodeAnsi = sResult
End Function

也就是用chr()函数把10进制的ANSI 字符代码转换成文字。文字本身应该是unicode，也就是vbs自动完成了gb-utf的转换，下面是我测试的一些数据：
测试代码：（需要把上面的代码加在前面）

<SCRIPT RUNAT=SERVER LANGUAGE=JAVASCRIPT>
Response.write("<br/>strx = chr(54992):");
Response.write(strx);
Response.write("<br/>strx.charCodeAt(0):");
Response.write(strx.charCodeAt(0));
Response.write("<br/>\"中\".charCodeAt(0):");
Response.write("中".charCodeAt(0));
Response.write("<br/>escape(strx):");
Response.write(escape(strx));
Response.write("<br/>encodeURI(strx):");
Response.write(encodeURI(strx));
Response.write("<br/>escape(\"中\"):");
Response.write(escape("中"));
Response.write("<br/>String.fromCharCode(20013):");
Response.write(String.fromCharCode(20013));
</SCRIPT>

分别调整文件存储格式，codepage，charset得到的结果：

文件为ansi格式：
codepage=936：
Response.Charset = "gb2312";
strx = chr(54992)
strx:中
strx.charCodeAt(0):20013
"中".charCodeAt(0):20013
escape(strx):%u4E2D
encodeURI(strx):%E4%B8%AD
escape("中"):%u4E2D
String.fromCharCode(20013):中

Response.Charset = "utf-8";
strx = chr(54992)
strx:֐
strx.charCodeAt(0):20013
"֐".charCodeAt(0):20013
escape(strx):%u4E2D
encodeURI(strx):%E4%B8%AD
escape("֐"):%u4E2D
String.fromCharCode(20013):֐

codepage=65001:
Response.Charset = "gb2312";
strx = chr(54992)
strx:涓
strx.charCodeAt(0):20013
"".charCodeAt(0):-1.#IND
escape(strx):%u4E2D
encodeURI(strx):%E4%B8%AD
escape(""):
String.fromCharCode(20013):涓

Response.Charset = "utf-8";
strx = chr(54992)

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