在表单提交调用函数javascript之前
问题描述:
我的程序经理是php中的QR码。我有我的QR码列表,并有(以及其他选项)删除QR码的选项。当我点击删除时,我想在javascript中显示确认消息。当我点击保存时,我不需要确认。
My program manager is a QR-code in php. I have my list of QR-codes and have (among other options) the option to delete the QR-code. When I click delete, I want to bring up a confirmation message in javascript. When I click save, I do not need confirmation.
我的表格:
<form method="post" enctype="multipart/form-data">
(...)
<input type="submit" name="save_edit" value="SAVE" />
<input type="submit" name="delete" value="Delete QR-code" />
</form>
我的代码:
if(isset($_POST['delete']))
{
$id = $_SESSION['tmp_id'];
$query = mysql_query("SELECT name_file FROM $tbl_query WHERE id='$id'");
if(mysql_num_rows($query) > 0)
{
while($row = mysql_fetch_array($query))
{
$result = mysql_query("DELETE FROM $tbl_query WHERE id='$id'");
unlink("img_qr/".$row["name_file"]);
if($result)
{
$_SESSION['alert_type']=1;
$_SESSION['msg_alerr']= "QR-code delete!";
}
else
{
$_SESSION['alert_type']=-1;
$_SESSION['msg_alert']= "Error!";
}
}
}
}
I试过javascript但它不起作用:
I tried javascript but it doesn't work:
<script type="text/javascript">
function confirm() {
var r=confirm('Are you sure you want to delete??');
if (r==true)
{
//delete file...
}
}
</script>
我想在删除之前看到确认窗口。
I want to see a confirmation window before deleting.
答
将其放入您的表单中:
<form method="post" enctype="multipart/form-data" onsubmit="return confSubmit();">
你的javascript函数应该是
And your javascript function should be
<script type="text/javascript">
function confSubmit() {
var r=confirm('Are you sure you want to delete??');
return r;
}
</script>