!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
html xmlns="http://www.w3.org/1999/xhtml"
head
meta http-equiv="Content-Type" content="text/html; charset=gb2312" /
titleUntitled Document/title
SCRIPT language=javascript1.3!--
var testleng=300;//允许多少字符串填入
function GC_UpdateCharCount() {
var desc_el = document.getElementById(''desc'');
var remainingchars_el = document.getElementById(''remainingchars'');
var num_remaining = testleng - desc_el.value.length;
if (num_remaining = 0) {
remainingchars_el.innerHTML = num_remaining;
} else {
remainingchars_el.innerHTML = "font color=red" +
(-num_remaining + '''') + " characters over/font";
}
}
function isOver(sText)
{
var intlen=sText.value.length;
if (intlentestleng)
{
alert("描述特征的内容的字数必修小于或者等于 "+testleng);
sText.focus();
sText.select();
}
}
//--/SCRIPT
/head
body
BGroup description/BBRTEXTAREA id=desc onkeydown=GC_UpdateCharCount() onkeyup=GC_UpdateCharCount() onblur="isOver(this);"style="WIDTH: 99%" name=desc rows=4 cols=50/TEXTAREA
BRLetters remaining: SPAN id=remainingchars
SCRIPT language=javascript1.2!--
GC_UpdateCharCount();
//--/SCRIPT/SPANNOSCRIPT300 characters allowed /NOSCRIPT
/body
/html