asp(javascript)全角半角转换代码 dbc2sbc

asp全角半角转换函数
flag=-1时进行半角转全角
flag=0时进行半角全角互转
flag=1时进行全角转半角

<% 
Function DBC2SBC(Str, flag) 
Dim i, sStr 
If Len(Str)<= 0 Then Exit Function 
DBC2SBC = "" 
For i = 1 To Len(Str) 
sStr = Asc(Mid(Str, i, 1)) 
Select Case flag 
Case -1 
If sStr>0 And sStr<= 125 Then 
DBC2SBC = DBC2SBC & Chr(Asc(Mid(Str, i, 1)) -23680) 
Else 
DBC2SBC = DBC2SBC & Mid(Str, i, 1) 
End If 
Case 0 
If sStr>0 And sStr<= 125 Then 
DBC2SBC = DBC2SBC & Chr(Asc(Mid(Str, i, 1)) -23680) 
Else 
DBC2SBC = DBC2SBC & Chr(Asc(Mid(Str, i, 1)) + 23680) 
End If 
Case 1 
If sStr<0 Or sStr>125 Then 
DBC2SBC = DBC2SBC & Chr(Asc(Mid(Str, i, 1)) + 23680) 
Else 
DBC2SBC = DBC2SBC & Mid(Str, i, 1) 
End If 
End Select 
Next 
End Function 
%>

javascript版 全角半角转换函数

function dbc2sbc(sStr){ 
var dbc2sbc = sStr; 
for (var i = 65281; i < 65375; i++) { 
var re = new RegExp(String.fromCharCode(i), "g"); 
var va = String.fromCharCode(i - 65248); 
dbc2sbc = dbc2sbc.replace(re, va); 
} 
dbc2sbc = dbc2sbc.replace(/　/g, ' '); 
return dbc2sbc; 
}

Javascript常用函数 sbc2dbc()

function sbc2dbc(sStr){ 
var sbc2dbc = sStr; 
for (var i = 33; i < 127; i++) { 
stringFromCharCode = String.fromCharCode(i); 
switch (stringFromCharCode) { 
case "(": 
case ")": 
case "*": 
case "+": 
case "/": 
case "\\": 
case "[": 
case "]": 
case "?": 
case "$": 
case ".": 
case "^": 
case "|": 
stringFromCharCode = '\\' + stringFromCharCode; 
default: 
break; 
} 
var re = new RegExp(stringFromCharCode, "g"); 
var va = String.fromCharCode(i + 65248); 
sbc2dbc = sbc2dbc.replace(re, va); 
} 
sbc2dbc = sbc2dbc.replace(/ /g, '　'); 
return sbc2dbc; 
}