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js监听鼠标事件控制textarea输入字符串的个数

整理:jimmy2026/9/3浏览2次

站长资源网络编程网盘链接云盘下载

简介【Html代码】

短信内容：

<div id="MyContent"><p>【Html代码】</p>

<tr>

<td>

<textarea name="message" cols="96" rows="5" onKeyDown="textCounter(message,remLen,65);"

onKeyUp="textCounter(message,remLen,65);"></textarea>

<tr><td></td>
<td>您还可以输入:<input name="remLen" type="text" value="65" size="5" readonly="readonly">个字符,每条短信最大允许输入<strong>65</strong>个字符</td>

</tr>

</table></pre>
</div>

<p>【对应的js代码】</p>

<div class="htmlcode">
<pre class="brush:js;">
<script>
function textCounter(field, countfield, maxlimit) {
if (field.value.length > maxlimit)
field.value = field.value.substring(0, maxlimit);
else
countfield.value = maxlimit - field.value.length;
}
</script></pre>
</div></div>
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