今天自己在做一個小網站的時候用到這個功能,便把代碼貼了下來,代碼如下:
Code
<!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />-->
<
script type
=
"
text/javascript
"
language
=
"
javascript
"
>
function
textCounter(field, maxlimit)
{
if
(document.getElementById(field).value.length
>
maxlimit)
{
document.getElementById(field).value
=
document.getElementById(field).value.substring(
0
,maxlimit);
}
else
{
document.getElementById(
"
remLen
"
).value
=
maxlimit
-
document.getElementById(field).value.length;
}
}
<
/
script>
aspx頁面代碼:
Code
<!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />-->
<
form runat
=
"
server
"
id
=
"
writemsgtxt
"
>
<
table width
=
"
100%
"
border
=
"
0
"
cellspacing
=
"
0
"
cellpadding
=
"
0
"
>
<
tr
>
<
td height
=
"
22
"
align
=
"
left
"
>&
nbsp;你還可以留言
<
input
readonly
type
=
"
text
"
id
=
"
remLen
"
runat
=
"
server
"
size
=
"
4
"
maxlength
=
"
3
"
value
=
"
500
"
class
=
"
input1
"
/>
字
</
td
>
</
tr
>
<
tr
>
<
td align
=
"
left
"
>
<
asp:TextBox ID
=
"
content
"
runat
=
"
server
"
CssClass
=
"
input2
"
Rows
=
"
8
"
Columns
=
"
50
"
TextMode
=
"
MultiLine
"
onkeyup
=
"
textCounter('content',500)
"
></
asp:TextBox
>
</
td
>
</
tr
>
</
table
>
</
form
>
引用自：
http://www.cnblogs.com/gaozhong98/archive/2008/11/04/1326571.html
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