Currently, I am using an with ajax to update my mysql. Now, I have to click on the button with the mouse for it to work (I am using onclick), but how can I make it accept the "enter" button? My guess is... Enter isn't working because isn't there. If I leave it there, my ajax just doesn't move.
Use a <input type="submit> instead of a <button> or type="button" and then hook into the forms' onsubmit event.
For example:
<form action="#" onsubmit="alert('Hello world!'); return false">
<input type="text" name="myText" id="myText" />
<input type="submit" value="Submit" />
</form>
The return false ensures that the browser doesn't actually submit a form.
If you're in an HTML form, then enter will submit the data. You only have to write in the onsubmit event handler to do your ajax calls.
If you're not in an HTML form, check for the key press event handler. Maybe it's what you're looking for.
Related
I'm a noobie programmer and I wonder how to properly submit a form with javascript.
I made some test code to show you what I mean:
<?php
if (isset($_POST['message']))
{
echo $_POST['message'];
}
?>
<script>
function formsubmit()
{
document.getElementById('form').submit();
}
</script>
<form id="form" name="form" action="" method="post">
<input id="message" name="message" value="hello world">
<input id="submit" name="submit" type="submit">
</form>
Click me<br/>
<input type="submit" onClick="formsubmit()" value="Click me">
When you push the "submit" button inside the tags - the php code will echo "hello world".
When submitting the form with JS the values won't post to the page. What am I doing wrong?
Thanks in advance.
I've searched the whole afternoon for a solution, but cause of my lack of knowledge about programming I failed to find it.
Believe it or not, but the main problem lies here:
<input id="submit" name="submit" type="submit">
If a form contains an input element with name (or id) of submit it will mask the .submit() method of the form element, because .submit will point to the button instead of the method. Just change it to this:
<input name="go" type="submit">
See also: Notes for form.submit()
The smaller problem is here:
Click me<br/>
An empty anchor will just request the same page again before calling formsubmit(). Just add href="#".
The problem here is that the id and name of the input element on your form is called submit.
This will mask the submit function for the form. Change the name and id and you will be able to use javascript to submit the form.
try setting the href of the to '#'. I would guess what is happening is that by clicking on the link, it submits the form and immediately changes the url to the same page you are on cancelling the form submit before it has a chance to go.
I am trying to submit a form with jQuery and I must be missing something small, because I can't get this to work, and from everything I see it should work fine.
What's wrong with this?
<table class="newrecord"><form id="editthis" action="page.php" method="post">
<tr><td class="left">Name:</td><td><input type="text" name="name" id="name" /></td></tr>
<tr><td class="left">Company:</td><td><input type="text" name="company" /></td></tr>
<tr><td class="left">Cancel</td><td><input type="button" name="submit" class="subbut" id="subthis" value="Update" /></td></tr>
</form></table>
And the javascript:
$("#subthis").click(function() {
$('#editthis').submit(); // An alert box works, so I know this is triggering
});
As mentioned in the code, an alert box works if I click the submit button, but when I use the jQuery submit function, nothing happens. What am I missing???
You don't need to use jQuery to submit a form. It's default behavior for a submit button to submit the form it belongs to.
Also, don't use a table for layout. The form elements themselves can layout just fine.
<form id="edit_this" action="page.php" method="POST">
<label>Name <input type="text" name="name"></label>
<label>Company <input type="text" name="company"></label>
Cancel
<button type="submit">Update</button>
</form>
Can be easily layout'd and will submit on its own.
If you need something to happen before the submission with jQuery, bind it to the form's onsubmit handler, rather than the actual click of the button.
The actual problem is the collision between the name you've given to the button and the reserved word in JavaScript. Don't use submit as the name.
I see two possible problems.
1) You have form tags inside table tags. While this probably isn't the root cause of your problem, it's not valid HTML.
2) You've used "submit" as the name of your submit button. This should be avoided because your object will collide with JavaScript reserved words. Use something other than "submit" like you've done with the id attribute.
So I have this simple form:
<form action="includes/process.php" method="post" name="standard_use" id="standard_use" enctype="multipart/form-data">
<button onclick="dofunction(); return false;">Do it!</button>
<input type="file" id="upload_file" name="filename" style="float:left;width:70%;" size="42"/>
</form>
So what happens really when the button is clicked ?
Is it that the php file is called ? does it not ? the javascript is called before ?
Anyone can shed some light on this ?
Thanks !
Well, when you hit the button the following events occurs:
You send a REQUEST to the server
The php codes evaluates the request and runs some codes
Finally it returns back a RESPONSE which you see as a web page
Javascript is a client-side script which means that whenever you make an action on the page, the code runs. For instance, when you click the button, before sending the request javascript will work. You may, for instance, place a function that will be triggered when you hit the button which checks the form and either approves the form or shows the error messages
EDIT
As far as your comment is concerned:
Yes, javascript runs first when you hit the submit button. Php runs only when you submit the form and make a request to the server.
Consider this example: (I am better at explaining things with examples:)
<form action="somepage.php" onsubmit="return checkMe()" method="POST">
<input name="firstname" id="fn" value="" type="text" />
<input type="submit" value="Submit" />
<script type="text/javascript">
function checkMe(){
var tb = document.getElementById("fn")
if(tb.value == "Alex") return true;
else return false;
}
</script>
</form>
So basically, when you hit the button and try to submit the form, the javascript will first check whether the name provided in the textbox is Alex or not, if it is not then it will not submit the form. If it is Alex then it will submit the form and then the form will redirect the user to somepage.php. Finally, the php codes will work in somepage.php and the page will be rendered again.
What happens is that only doFunction() javascript function is invoked and nothing more.
However, it might be possible that this javascript function invokes "submit" event on the form and the request is sent (what you described as "php file is called").
Your code just trigger javascript event and your function. To submit a form you need an
<input type="submit" value="Submit" />
or a button, which default type is submit (thx davin)
<button value="Submit" />
However as far as you return false in your javascript code your form won't be submitted even with the submit button.
Given this simple javascript function:
function update_cart() {
alert("--update--");
document.form1.command.value="update";
document.form1.submit();
}
and this button at the bottom of my form:
<input type="submit" value="Update" onclick="update_cart()" />
The data in the form is 'submitted' to the new URL. but the update_cart function is never called. I know because I never get an alert box, and the URL reads...?c=Albania&m=....
Also, the form element
<input type="hidden" name="command"/>
does not get posted to the URL, either. URL reads ?command=&c=Albania...
I have tried the following: changed onclick to onsubmit, checking $_REQUEST variables, cutting and pasting the code from known working pages.
I'm at my wit's end, and would be grateful for any help!
Oh, yes: same behaviour in firefox 6, Opera 11.5, & IE7. I'm running WinXP SP3.
Thanking you,
Sadhu!
Once try
<input type="button" value="Update" onclick="update_cart()" />
instead
<input type="submit" value="Update" onclick="update_cart()" />
if you want that for 'submit' type then go with 'Allen Liu' answer
enter code hereif you wane to change sth when onsubmit, you need to do these changes before form's submitting. so you need to add these opeartion to the "onsubmit" event of the form, rather than the "onclick" event of the submit button.
like this:
<form name="toSubmit" onsubmit="update_cart();"><input type="submit" name="btn" value="hello"/></form>
If you want the script to run on submit of form, use:
<input type="submit" value="Update" onsubmit="update_cart()" />
The onsubmit event is usually used to run some validation script. If the validation returns true, the form will submit. If it returns false, the form does not submit. In your case, the script is coded to submit the form so no return boolean value is necessary.
Otherwise, I would not give your button the submit type if it really doesn't submit the form. You can simply use button tags with the onclick and that should work:
<button onclick="update_cart()">Update</button>
First of all there is no need to change your html; see my demo.
On every click on a submit button, first the click-handler (if exists) will be started, then the submit-handler (if exists) (which should be in the form tag) and then the action of the form will be executed. This procedure will be only stoped, if a handler returns false.
But why will your javascript function update_cart not be called?
I think it could not be found, but I don't why. Can you bind the function to the window dom element only for testing (like in my demo)?
P.s.: you don't need to submit the form in your click-handler (if you don't return false). You can remove the line: document.form1.submit();.
P.s.: it will be better not to use a click-handler on the submit-button, instead use a submit-handler in the form tag (see my demo2).
this is a general form code
<form name="search_form" action="" method="POST">
<input type="text" name="search_text">
<input type="submit" name="search_bt" value="Go">
</form>
is there a way could have a confirmation dialog saying 'Yes'\'No' or 'Confirm'\'Cancel' etc...
One way i figured of dong is is with CSS Layer and JavaScript and Php... that have a php isset(){} chechk on the button and when set display a Div displayed with two buttons and onclick=func() JS function of those buttons have a php variable(flag) set and then i can if(flag){} to continue or skip some code...
well that is going to work and plus point is that i can have a well themed dialog box but i just wanna make my life easier...
You can also do it with one line in the form tag itself
<form action="exampleHandlerPage.php" method="post" onsubmit="return confirm('Are you sure you want to submit?');">
If you have 2 or more submit buttons in one form:
<input type="submit" value="Edit">
<input type="submit" name="delete" value="Delete" onclick="return confirm('Confirm, please.');">
The dialog shows up only when you click the Delete button.
Using raw javascript without any div...
You can have this function
function confirmSubmit() {
if (confirm("Are you sure you want to submit the form?")) {
document.getElementById("FORM_ID").submit();
}
return false;
}
And you can call that function from the onsubmit event in the form, or on the onclick event in the button.
By the way, have you heard about JQuery. Its a JS Library with a lot of helpful things that give you a comfort and beauty way of coding javascript.
As an example of what you want to get done, take this confirmation dialog from JQuery as example
<form action="<form handler>" method="post" onsubmit="return confirm('Are you sure you want to submit?')">
is this javascript can be store diferent from tag "form", replace
return confirm(...)
with something like
return sendata(...)