Some functions, such as the Microsoft Visual Basic (VB) and Visual Basic Script (VBScript) AscW
function, may return a negative number when you ask for the Unicode value of a non-Latin character (such as Chinese Hanzi, Japanese Kanji or Korean Hangul). When you use this negative number as an HTML entity reference (&#nnnn
, where nnnn
is either a hexadecimal or decimal Unicode number), you see the entity reference as literal text, instead of the corresponding non-Latin character.
Unicode numbers occupy a 16-bit positive range from 0 to 65535 (0xFFFF), and cannot be negative.
returns a negative number, it returns the twos complement form of that number. To convert the twos complement notation into normal binary notation, add 0xFFF to the return result. For an example, see the "More Information" section.
Steps to Reproduce Behavior
- Save the following HTML code to a file named TestAscW.htm:
<TITLE>PRB: Negative Integers Do Not Work as Unicode HTML Entity References</TITLE>
// The character used below is the Japanese character "go" (8A9E in
div1.innerHTML = "Actual character is 語 & AscW output is &#" & AscW(ChrW(35486))
<BODY language="VBScript" onload="load()">
- Open this file in Internet Explorer. The second character reference is displayed as raw text, and not as the Japanese character "go."
To work around this problem, change the script block to the following:
sAscVal = AscW(sOutput)
If sAscVal < 0 Then
sAscVal = 65536 + sAscVal
DecodeAscW = sAscVal
div1.innerHTML = "Actual character is 語 AscW output is &#" & DecodeAscW(ChrW(35486))
For more information about developing Web-based solutions for Microsoft Internet Explorer, visit the following Microsoft Web sites: