textarea字數限制
阿新 • • 發佈：2019-02-14
<script type="text/javascript">
function collect_submit() {
var len = $(".describe").val().length;
var num = 500 - len;
if (len > 501) {
$(this).val($(this).val().substring(0, 500));
}
if (len < 5) {
alert("最少5個字");
}
}
function collect_submit() {
var len = $(".describe").val().length;
var num = 500 - len;
if (len > 501) {
$(this).val($(this).val().substring(0, 500));
}
if (len < 5) {
alert("最少5個字");
}
}
</script>
<textarea name="describe" class="describe" cols="54" rows="10"
onchange="this.value=this.value.substring(0, 500)"
onkeydown="this.value=this.value.substring(0, 500)"
onkeyup="this.value=this.value.substring(0, 500)"
placeholder="請儘可能詳細的的描述您的業務，至少5個字，最多500個字">
</textarea>