I'm writing a cms page for my site. part of it is writing a preview component for my blog. I have a form, and a preview button, that activates a Javascript, which places the html typed in the text-area in a div element to test it. Everything works fine but the problem is that it only works once for each pageload. So I can't test something, add some code and retest it. Any ideas how to make multiple testing possible ?
Code Form:
<form>
<textarea rows="30"cols="30" name="blogpost" style="width:500px;resize:none;" autofocus placeholder="Enter your new blogpost here!"></textarea>
</br>
<input type = "submit" value="post">
<input type = "button" id="testknop" value="previeuw" onclick="previeuwpost(this.form, this.form.blogpost);">
<input type="reset" />
</form>
Javascript Code:
function previeuwpost(form, text){
$("#previeuwbox").replaceWith(text.value);
}
Thanks a lot folks
replaceWith means replaced.
Therefore, after you click, the $("#previeuwbox") is gone.
Please use :
$("#previeuwbox").html(text.value);
Related
I am an absolute begginer to web developing and I want to simply do a chance calculator in the online tool: jsfiddle. I got the error:"Shell form does not validate" and some strange errors after. Here is my HTML code:
<body>
<form method="post">The chance of succes:
<input type="number" name="chance">
<br>How many tries:
<input type="number" name="tries">
<br>
<input type="submit" value="Calculate!">
<br>
</form>
</body>
And my javascript code is:
function calculate(chance, tries) {
console.log(chance / tries * 100);
}
As I said, I am new to this so please try to explain step by step.
You have a few problems. One is that your form is trying to submit itself to itself. Another is that your calculate function is never called.
Your parameters for the function are never called either. Let's change the inputs to have an id instead of a name. For example:
<input type="number" id="chance">
This makes it easier to get the value from the input when clicking the button. I've made the input a button instead of a submit, just to make sure that your form data isn't getting sent anywhere.
<input type="button" onclick="return calculate(getElementById('chance').value, getElementById('tries').value)" value="Calculate!">
Here is a jsfiddle with a possible solution for you. http://jsfiddle.net/0dmkxcab/
Okay, I'm pretty sure I'm missing something very obvious here, but I just couldn't find a proper solution so far. What I'm trying to do is simple: Have a user write something into a form, have him submit the form, and write that input into a textarea on the same page.
This is my code:
<html><head></head>
<body>
<form name='registration'>
<label for="input">Input:</label>
<input type="text" id="input"/>
<input type="submit" id="submit" value="Submit" onclick="execute()"/>
</form>
<div id="results">
<span>Result</span>
<span><textarea cols="30" rows="5" id="resulttext" readonly="readonly"></textarea> </span>
</div>
<script>
function execute()
{
var result = document.getElementById("input").value
document.getElementById("resulttext").value=result;
}
</script>
</body>
</html>
Now what happens if I enter something into the form is that the textarea briefly shows my input before reverting back to showing nothing. My guess is that the textarea field is only changed for the duration of the execute() function.
When I change input type="submit" to a <button> everything works as intended, but I'm pretty sure I'm not supposed to do that.
You need to cancel the default event for the submit button, otherwise it just submits the form (which in this case essentially reloads the page since there are no form elements with names). Add return false;after execute() (put a ; in between the two pieces)
Because your button is of type submit, it will submit your form after executing the execute() method. You can change the button type to type="button" and you will not have this submit behavior.
http://jsfiddle.net/PCCbh/
Note - using <button> is okay in this case. It is essentially the same as <input type="button".
I've been trying to figure out how to customize the appearance of a file input in an HTML form so that the button will match with the rest of the buttons on my site. Looking around here I found a solution that I would expect to work, but it's having some strange behavior.
I took my file input and set display:none, and created a new text input and button within the form.
<form method="post" action="../Entry/Create" enctype="multipart/form-data" onsubmit="return aentryValidate()">
<input type="text" id="EntryTitle" name="EntryTitle" maxlength="50" />
<div id="invalidTitle" class="invalidData"></div>
<p id="char-remaining">(50 characters remaining)</p>
<input type="file" id="ImageFile" name="ImageFile" style="display:none;" />
<input type="text" id="ImageFileMask" name="ImageFileMask" disabled="true" />
<button type="button" onclick="HandleFileButtonClick()" id="ImageFileButton" style="margin-left:10px;padding-bottom:0px;height:20px;width:100px;font-size:14px;">browse...</button>
<div id="invalidImage" class="invalidData"></div>
<p id="file-desc">(image to represent your entry, jpg, png, or gif)</p>
<textarea id="EntryDesc" name="EntryDesc"></textarea>
<div id="invalidDesc" class="invalidData"></div>
<br />
<input type="checkbox" id="isPrivate" name="isPrivate" value="true" />
<input type="hidden" name="isPrivate" value="false" />
Make my entry private.
<button id="new-entry-save">save</button>
</form>
Then my javascript to handle the ImageFileButton button being clicked:
function HandleFileButtonClick() {
document.getElementById("ImageFile").click();
document.getElementById("ImageFileMask").value = document.getElementById("ImageFile").value;
}
It appears to work fine. I click the button, the window pops up for me to select a file. When I select a file, it appears in the text box.
The weird behavior comes when I hit the save button on the form. I noticed that it has to be clicked twice to actually submit for some reason now. And, when it submits it is no longer posting the file.
So I made the file input visible again to see what was happening. If I use the ImageFileButton button to select a file, the file shows up in the file input. But when save is clicked, the file input clears and the form doesn't submit. You then have to click again to submit, and of course now there is no file.
Anybody know what is happening here?
No, its not possible. File inputs are generally browser dependant. You might have to use JavaScript replacement or Flash replacement like uploadify.
Article: Input File
Of all form fields, the file upload field is by far the worst when it comes to styling. Explorer Windows offers some (but not many) style possibilities, Mozilla slightly less, and the other browsers none at all. The "Browse" button, especially, is completely inaccessible to CSS manipulation.
I'm trying to achieve the following behaviour in html: user is presented with a form involving several text fields. The fields are populated with default values, but in many cases the user will wish to enter their own. When the page loads, the value in the first field is selected, so the user can either replace it by simply starting to type and tabbing out to the next field, or simply leave it and tab out. Here's a pared down example of what I have:
<html>
<body onload="document.getElementById('helloField').select()">
<form>
<input id="helloField" value="hello"/><br/>
<input value="goodbye"/><br/>
<input type="submit" value="Submit"/>
</form>
</body>
</html>
This works in Chrome (and Firefox I believe, but I don't have it here). In IE, the field is selected as intended, but when the user hits tab, the browser tabs out to its address bar rather than to the goodbye field. If I replace the select with a simple focus, like
<body onload="document.getElementById('helloField').focus()">
the tabbing is okay in all browsers, but this isn't what I want. I want the user to be able to start typing right away to replace the default value.
Anyone have any ideas?
Thanks.
Focus, then select.
Also consider putting the code in a script block directly after the input in question. If you have a bunch of images on the page, document.onload can fire quite a lot later, and the last thing you want is to be typing away in an input box when onload fires and hijacks your focus (making you delete the contents of the box).
<input id="helloField" value="hello"/><br/>
<script type="text/javascript">
var hello= document.getElementById('helloField');
hello.focus();
hello.select();
</script>
Try setting the tab order of the fields using tabindex:
<html>
<body onload="document.getElementById('helloField').select()">
<form>
<input id="helloField" value="hello" tabindex="1" /><br/>
<input value="goodbye" tabindex="2" /><br/>
<input type="submit" value="Submit" tabindex="3" />
</form>
</body>
</html>
I'm working on a simple javascript login for a site, and have come up with this:
<form id="loginwindow">
<strong>Login to view!</strong>
<p><strong>User ID:</strong>
<input type="text" name="text2">
</p>
<p><strong>Password:</strong>
<input type="password" name="text1"><br>
<input type="button" value="Check In" name="Submit" onclick=javascript:validate(text2.value,"username",text1.value,"password") />
</p>
</form>
<script language = "javascript">
function validate(text1,text2,text3,text4)
{
if (text1==text2 && text3==text4)
load('album.html');
else
{
load('failure.html');
}
}
function load(url)
{
location.href=url;
}
</script>
...which works except for one thing: hitting enter to submit the form doesn't do anything. I have a feeling it's cause I've used "onclick" but I'm not sure what to use instead. Thoughts?
Okay yeah so I'm well aware of how flimsy this is security-wise. It's not for anything particularly top secret, so it's not a huge issue, but if you guys could elaborate on your thoughts with code, I'd love to see your ideas. the code i listed is literally all I'm working with at this point, so I can start from scratch if need be.
There are several topics being discussed at once here. Let's try to clarify.
1. Your Immediate Concern:
(Why won't the input button work when ENTER is pressed?)
Use the submit button type.
<input type="submit".../>
..instead of
<input type="button".../>
Your problem doesn't really have anything to do with having used an onclick attribute. Instead, you're not getting the behavior you want because you've used the button input type, which simply doesn't behave the same way that submit buttons do.
In HTML and XHTML, there are default behaviors for certain elements. Input buttons on forms are often of type "submit". In most browsers, "submit" buttons fire by default when ENTER is pressed from a focused element in the same form element. The "button" input type does not. If you'd like to take advantage of that default behavior, you can change your input type to "submit".
For example:
<form action="/post.php" method="post">
<!--
...
-->
<input type="submit" value="go"/>
</form>
2. Security concerns:
#Ady mentioned a security concern. There are a whole bucket of security concerns associated with doing a login in javascript. These are probably outside of the domain of this question, especially since you've indicated that you aren't particularly worried about it, and the fact that your login method was actually just setting the location.href to a new html page (indicating that you probably don't have any real security mechanism in place).
Instead of drudging that up, here are links to related topics on SO, if anyone is interested in those questions directly.
Is there some way I can do a user validation client-side?
Encrypting Ajax calls for authentication in jQuery
3. Other Issues:
Here's a quick cleanup of your code, which just follows some best practices. It doesn't address the security concern that folks have mentioned. Instead, I'm including it simply to illustrate some healthy habits. If you have specific questions about why I've written something a certain way, feel free to ask. Also, browse the stack for related topics (as your question may have already been discussed here).
The main thing to notice is the removal of the event attributes (onclick="", onsubmit="", or onkeypress="") from the HTML. Those belong in javascript, and it's considered a best practice to keep the javascript events out of the markup.
<form action="#" method="post" id="loginwindow">
<h3>Login to view!</h3>
<label>User ID: <input type="text" id="userid"></label>
<label>Password: <input type="password" id="pass"></label>
<input type="submit" value="Check In" />
</form>
<script type="text/javascript">
window.onload = function () {
var loginForm = document.getElementById('loginwindow');
if ( loginwindow ) {
loginwindow.onsubmit = function () {
var userid = document.getElementById('userid');
var pass = document.getElementById('pass');
// Make sure javascript found the nodes:
if (!userid || !pass ) {
return false;
}
// Actually check values, however you'd like this to be done:
if (pass.value !== "secret") {
location.href = 'failure.html';
}
location.href = 'album.html';
return false;
};
}
};
</script>
Put the script directly in your html document. Change the onclick value with the function you want to use. The script in the html will tell the form to submit when the user hits enter or press the submit button.
<form id="Form-v2" action="#">
<input type="text" name="search_field" placeholder="Enter a movie" value=""
id="search_field" title="Enter a movie here" class="blink search-field" />
<input type="submit" onclick="" value="GO!" class="search-button" />
</form>
<script>
//submit the form
$( "#Form-v2" ).submit(function( event ) {
event.preventDefault();
});
</script>
Instead of <input type="button">, use <input type="submit">. You can put your validation code in your form onsubmit handler:
<form id="loginwindow" onsubmit="validate(...)">
it's because it's not a form submitting, so there's no event to be triggered when the user presses enter. An alternative to the above form submit options would be to add an event listener for the input form to detect if the user pressed enter.
<input type="password" name="text1" onkeypress="detectKey(event)">
Maybe you can try this:
<form id="loginwindow" onsubmit='validate(text2.value,"username",text1.value,"password")'>
<strong>Login to view!</strong>
<p><strong>User ID:</strong>
<input type="text" name="text2">
</p>
<p><strong>Password:</strong>
<input type="password" name="text1"><br>
<input type="submit" value="Check In"/>
</p>
</form>
As others have pointed out, there are other problems with your solution. But this should answer your question.
Surely this is too unsecure as everyone can crack it in a second ...
-- only pseudo-secure way to do js-logins are the like:
<form action="http://www.mySite.com/" method="post" onsubmit="this.action+=this.theName.value+this.thePassword.value;">
Name: <input type="text" name="theName"><br>
Password: <input type="password" name="thePassword"><br>
<input type="submit" value="Login now">
</form>
My Thought = Massive security hole. Anyone can view the username and password.
More relevant to your question: - You have two events happening.
User clicks button.
User presses enter.
The enter key submits the form, but does not click the button.
By placing your code in the onsubmit method of the form the code will run when the form is submitted. By changing the input type of the button to submit, the button will submit the form in the same way that the enter button does.
Your code will then run for both events.