我想知道，如何判断用户输入的是否是汉字？

[jhlcss]

[julyclyde]

<0的才是呢

[BrightEye]

在javascript中,我是这样判断的.自己写了个函数,绝对好用!
<Script language=JavaScript>
function validate()
{ var sUser_name = new String(document.form1.UserName.value);
for(i=0;i<sUser_name.length;i++)
{
if(sUser_name.charCodeAt(i)<128)
{
alert("用户名必须全部为中文!");
return false;
}
}
return true;
}
</Script>

[BrightEye]

如果用Asc码判断,<0就是汉字.
<%for i=1 to Len(UserName)
if Asc(Mid(UserName,i,1))>=0 then
response.write "用户名必须全部为中文!"
end if
next%>

[希偌]

那到不一定，这只能说不是英文字母，不是常用符号

[希偌]

这确实需要一个汉字的编码范围！
下面这个是许多种文字的编码范围，你参考参考！
***************************************************
0000..007F; Basic Latin
0080..00FF; Latin-1 Supplement
0100..017F; Latin Extended-A
0180..024F; Latin Extended-B
0250..02AF; IPA Extensions
02B0..02FF; Spacing Modifier Letters
0300..036F; Combining Diacritical Marks
0370..03FF; Greek
0400..04FF; Cyrillic
0530..058F; Armenian
0590..05FF; Hebrew
0600..06FF; Arabic
0700..074F; Syriac
0780..07BF; Thaana
0900..097F; Devanagari
0980..09FF; Bengali
0A00..0A7F; Gurmukhi
0A80..0AFF; Gujarati
0B00..0B7F; Oriya
0B80..0BFF; Tamil
0C00..0C7F; Telugu
0C80..0CFF; Kannada
0D00..0D7F; Malayalam
0D80..0DFF; Sinhala
0E00..0E7F; Thai
0E80..0EFF; Lao
0F00..0FFF; Tibetan
1000..109F; Myanmar
10A0..10FF; Georgian
1100..11FF; Hangul Jamo
1200..137F; Ethiopic
13A0..13FF; Cherokee
1400..167F; Unified Canadian Aboriginal Syllabics
1680..169F; Ogham
16A0..16FF; Runic
1780..17FF; Khmer
1800..18AF; Mongolian
1E00..1EFF; Latin Extended Additional
1F00..1FFF; Greek Extended
2000..206F; General Punctuation
2070..209F; Superscripts and Subscripts
20A0..20CF; Currency Symbols
20D0..20FF; Combining Marks for Symbols
2100..214F; Letterlike Symbols
2150..218F; Number Forms
2190..21FF; Arrows
2200..22FF; Mathematical Operators
2300..23FF; Miscellaneous Technical
2400..243F; Control Pictures
2440..245F; Optical Character Recognition
2460..24FF; Enclosed Alphanumerics
2500..257F; Box Drawing
2580..259F; Block Elements
25A0..25FF; Geometric Shapes
2600..26FF; Miscellaneous Symbols
2700..27BF; Dingbats
2800..28FF; Braille Patterns
2E80..2EFF; CJK Radicals Supplement
2F00..2FDF; Kangxi Radicals
2FF0..2FFF; Ideographic Description Characters
3000..303F; CJK Symbols and Punctuation
3040..309F; Hiragana
30A0..30FF; Katakana
3100..312F; Bopomofo
3130..318F; Hangul Compatibility Jamo
3190..319F; Kanbun
31A0..31BF; Bopomofo Extended
3200..32FF; Enclosed CJK Letters and Months
3300..33FF; CJK Compatibility
3400..4DB5; CJK Unified Ideographs Extension A
4E00..9FFF; CJK Unified Ideographs
A000..A48F; Yi Syllables
A490..A4CF; Yi Radicals
AC00..D7A3; Hangul Syllables
D800..DB7F; High Surrogates
DB80..DBFF; High Private Use Surrogates
DC00..DFFF; Low Surrogates
E000..F8FF; Private Use
F900..FAFF; CJK Compatibility Ideographs
FB00..FB4F; Alphabetic Presentation Forms
FB50..FDFF; Arabic Presentation Forms-A
FE20..FE2F; Combining Half Marks
FE30..FE4F; CJK Compatibility Forms
FE50..FE6F; Small Form Variants
FE70..FEFE; Arabic Presentation Forms-B
FEFF..FEFF; Specials
FF00..FFEF; Halfwidth and Fullwidth Forms
FFF0..FFFD; Specials
10300..1032F; Old Italic
10330..1034F; Gothic
10400..1044F; Deseret
1D000..1D0FF; Byzantine Musical Symbols
1D100..1D1FF; Musical Symbols
1D400..1D7FF; Mathematical Alphanumeric Symbols
20000..2A6D6; CJK Unified Ideographs Extension B
2F800..2FA1F; CJK Compatibility Ideographs Supplement
E0000..E007F; Tags
F0000..FFFFD; Private Use
100000..10FFFD; Private Use

[希偌]

上面这个是unicode码的分布情况

[universe]

看其asc码值是否大于160
ord(str[0])

[jasonboy]

具体情况不知道，但是可以给你提供一些线索，汉字也应该是ascii码编排的，只要找到它的范围就可以了。我也很想知道，关注！！

[julyclyde]

asc>160再过时了

[julyclyde]

asc>160早过时了

[xuchu]

if asc < 0 or asc > 127

[lihaitaoami]

大于128的就是了。

[julyclyde]

但是不知道该用Asc还是ascb,ascw
微软的翻译文档很模糊

[BrightEye]

字符的Asc码通常用一个字节表示,其中最高位是标志位,剩余是7个bit用来表示字符.所以标准码共有128个.如果最高位为1的话,又有128个asc值.由于汉字内码最高为1,所以汉字的asc码小于0.

[lihaitaoami]

js脚本里的charCodeAt取出的都是正数，没有负数。
与vs里的asc是不一样的。

[BrightEye]

楼上的，对啊！我说的ASC码是针对VBS说的。

[hmbory]

还没解决吗

[julyclyde]

那ascw和ascb呢？

[wzy9645]

up