在
<head> 与 </head> 之间加入： <SCRIPT LANGUAGE="JavaScript">
maxLen
=50; // max number of characters allowed
function checkMaxInput(form) {
if
(form.message.value.length > maxLen) // if too long.... trim it!
form.message.value
= form.message.value.substring(0, maxLen);
// otherwise, update 'characters
left' counter
else form.remLen.value = maxLen - form.message.value.length;
}
</script> 在
<body> 与 </body> 之间加入： <form name=myform action="YOUR-SCRIPT.CGI">
<p align="center">
<font size="1" face="arial,
helvetica, sans-serif">
<font size="3"><br>
你可以输入50个字符<br> </font>
</font>
<font size="1"
face="arial, helvetica, sans-serif">
<textarea name=message
wrap=physical cols=28 rows=4
onKeyDown="checkMaxInput(this.form)"
onKeyUp="checkMaxInput(this.form)">
</textarea>
</font></p>
<p
align="center"> 还剩
<font face="arial, helvetica,
sans-serif" size="1">
<input readonly type=text name=remLen
size=3 maxlength=3 value="50">
<font size="3">个字符
</font></font>
</p></form><p> </p> |