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原标题:value.length < 10 return false not working

如果案文领域没有10个以上特性,但现在就停止提交,我就不认为我改变了情况,但显然我必须做一些事情。

<form class="form-new" action="insert/insert.php" method="post" onsubmit="if (document.getElementById( post-input ).value.length < 10) return false;">
    <textarea class="form-new" id="post-input" name="text"></textarea><br/>
    <input type="hidden" name="ciudad" value="<?=$city;?>">
    <input type="text" name="colegio" value="<?=$group;?>">
    <input class="form-new" type="submit" value="Publicar"/>
</form>

是否有办法? 或者,我是否这样做是错误的? 增 编

最佳回答

http://jsfiddle.net/YNcU4/“rel=“nofollow”>your example 。

但是,如果你在提交表格时回错,就会寄出任何路。 为了发出警告或发出这样的警告,你应当这样做:

<script type="text/javascript">
    function checkLength() {
        var textarea=document.getElementById( post-input );
    alert(textarea.value.length >= 10);
        if (textarea.value.length >= 10) {
            document.getElementById( myform ).submit();
        }
    }
</script>

<form class="form-new" action="insert/insert.php" id="myform" method="post">
    <textarea class="form-new" id="post-input" name="text"></textarea><br/>
    <input type="hidden" name="ciudad" value="<?=$city;?>">
    <input type="text" name="colegio" value="<?=$group;?>">
    <input class="form-new" type="button" value="Publicar" onclick="checkLength()"/>
</form>

http://jsfiddle.net/YNcU4/1/“rel=“nofollow” http://jsfiddle.net/YNcU4/1/。

<><>UPDATE: 请改为评论。 原来的法典应当发挥作用。

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