作者在 2011-08-06 09:40:19 发布以下内容
<html>
<head>
<script language=javascript>
function gbcount(message,total,used,remain)
{
var max;
max = total.value;
if (message.value.length > max) {
message.value = message.value.substring(0,max);
used.value = max;
remain.value = 0;
alert("超过 "+max+"个字!");
}
else {
used.value = message.value.length;
remain.value = max - used.value;
}
}
</script>
</head>
<body>
实时显示输入文本框字数
<form>
<textarea class=cnone name="contents"
onmousedown="this.className='cdown'"
onmouseover="this.className='cup'"
onmouseout="this.className='cnone'"
onkeydown=gbcount(this.form.contents,this.form.total,this.form.used,this.form.remain);
onkeyup=gbcount(this.form.contents,this.form.total,this.form.used,this.form.remain);
cols="80" rows="8" wrap="VIRTUAL" id="contents">
</textarea>
最多字数：<INPUT class=cnone disabled maxLength=4 name=total size=3
value=500>
已用字数：<INPUT class=cnone disabled maxLength=4 name=used size=3
value=0>
可用字数：<INPUT class=cnone disabled maxLength=4 name=remain
size=3 value=500>
</form>
</body>
</html>
<head>
<script language=javascript>
function gbcount(message,total,used,remain)
{
var max;
max = total.value;
if (message.value.length > max) {
message.value = message.value.substring(0,max);
used.value = max;
remain.value = 0;
alert("超过 "+max+"个字!");
}
else {
used.value = message.value.length;
remain.value = max - used.value;
}
}
</script>
</head>
<body>
实时显示输入文本框字数
<form>
<textarea class=cnone name="contents"
onmousedown="this.className='cdown'"
onmouseover="this.className='cup'"
onmouseout="this.className='cnone'"
onkeydown=gbcount(this.form.contents,this.form.total,this.form.used,this.form.remain);
onkeyup=gbcount(this.form.contents,this.form.total,this.form.used,this.form.remain);
cols="80" rows="8" wrap="VIRTUAL" id="contents">
</textarea>
最多字数：<INPUT class=cnone disabled maxLength=4 name=total size=3
value=500>
已用字数：<INPUT class=cnone disabled maxLength=4 name=used size=3
value=0>
可用字数：<INPUT class=cnone disabled maxLength=4 name=remain
size=3 value=500>
</form>
</body>
</html>