我具有以下形式,并且在单击“加入”按钮后,应将其更改为删除按钮。我想更改文本以说删除并更改其功能。
这是我的代码:
<form action="riderJoin.php" method="post">
<input type ="hidden" name = id value="<?php echo $row['post_id']; ?>" >
<input type =submit class="edit_btn " name = "submit" value = "Join">
</form>
<script type="text/javascript">
var x = document.getElementsByClassName('edit_btn');
<?php if (isset($_POST['submit'])) { ?>
var i = <?php echo $_SESSION['postId'] ; ?> - 1 ;
var y = x[i];
x[i].textContent = "Delete";
x[i].style.backgroundColor = "red";
x[i].style.color = "white";
<?php }?>
</script>
我已经按类名将按钮获取到var
x
中,并使用x[i]
在x内抓取了一个项目,但是当我尝试更改文本内容时,它没有改变。但是,当我将背景色设置为红色时,效果很好。我做错了什么?
最佳答案
更新:更改按钮文本
创建按钮时,可以看到要更改的文本位于value
属性中:
<input type =submit class="edit_btn" name = "submit" value = "Join">
因此这就是您要更改的内容-而不是
textContent
例如 x[i].value = "Delete";
更新:更改窗体操作
要同时更改操作,首先,您需要在表单中添加一个ID,以便我们可以在其中找到JavaScript,例如
<form action="riderJoin.php" method="post" id="subscriptionform">
然后在javascript中,您可以获取它并更改操作,如下所示:
var formelement = document.getElementById('subscriptionform');
formelement.action = "newAction.php"; // set the action to whatever page you want
工作示例:单击按钮更改文本,新操作也将显示
function changebutton() {
// get the button and change it
var x = document.getElementsByClassName('edit_btn');
x[0].value = "Delete";
x[0].style.backgroundColor = "red";
x[0].style.color = "white";
// change the action of the form
var formelement = document.getElementById('subscriptionform');
formelement.action = "yourNewAction.php";
// Just for testing - gets the form action & displays it
updateStatusText();
}
// Just for testing - gets the form action & displays it
function updateStatusText(){
var formelement = document.getElementById('subscriptionform');
currentaction = formelement .action;
var textelement = document.getElementById('actiontext');
textelement.innerText= "The form action is: "+currentaction;
}
updateStatusText();
<form action="yourAction.php" method="post" id="subscriptionform">
<input type=submit class="edit_btn " name="submit" value="Click Me..." onclick="changebutton(); return false;">
</form>
<p id="actiontext"></p>