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怎样set focus?

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nic58191

2010-9-18 02:52 PM

我检查顾客的nric是否只有一个而已，如果发现已经在系统里
就会popup alert
我要怎样set focus呢？

if ( ! checkUnique('user_new_nric', $_POST['user_new_nric']) )
{
echo '<script = "JAVASCRIPT">alert("The new NRIC you used is associated with another user. Please try again!")
</script>';
}

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wewanwang

2010-9-18 07:48 PM

试试这个：

echo '<script = "JAVASCRIPT">alert("The new NRIC you used is associated with another user. Please try again!");
document.yourform.fieldname.focus();
</script>';

nic58191

2010-9-19 04:02 PM

回复 2# wewanwang

Error:'document.subAgent.user_new_nric' is null or not an object

clown09

2010-9-19 10:32 PM

if ( ! checkUnique('user_new_nric', $_POST['user_new_nric']) )
            {
                     echo '<script = "JAVASCRIPT">alert("The new NRIC you used is associated with another user. Please try again!")
                     </script>';
            }

请在user_new_nric的input 加上 id, eg:
<input type="text" name="user_new_nric" id="user_new_nric" value="" />
Javascript 部分：
<script type="text/javascript">
document.getElementById("user_new_nric").focus();
</script>. 请把这部分的code放置在<input type="user_new_nric" />出现之后。Error:'document.subAgent.user_new_nric' is null or not an object 的问题是因为你在<input />之前，放入<script>，这样js 这么可能找到<input />?

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怎样set focus?

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