【Html代码】
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<table>
<tr>
<td width="150">短信内容：</td>
<td>
<textarea name="message" cols="96" rows="5" onKeyDown="textCounter(message,remLen,65);"
onKeyUp="textCounter(message,remLen,65);"></textarea>
<td>
</tr>
<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>
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【对应的js代码】
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<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>
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