Develop Reference

Button not executing window.location

Im actually having a problem with html5 button in visualforce pages. I have a requirement where when i click on a button, it should redirect to a certain page (user do not want link). For some reason which i don't know, the function i'm executing do not work with HTML5 button (in fact the page only refresh but do not redirect) but when i use input of type button, the function is executed as expected.
I want to use the html5 button as there are some specific css already defined for button in the plugin im using. Find below codes for my button and javascript function :
<button class="butt" onclick="newContact()" >Nouveau</button>
<script type="text/javascript">
function newContact(){
window.location = "/apex/VFP01_NewContact";
}
</script>
What did I do wrong here, and what is the limitation of html5 button ?

Got to know the answer. In visualforce page, the html5 button execute a submit of my form. A way to prevent this, was to specify the attribute type="button".

You really have two options.
You could consider wrapping a element with an anchor tag that points to the URL that you want to target as seen below :
<!-- Target the "YourAction" action in your "YourController" controller -->
<a href='#Url.Action("YourAction","YourController")'>
<input type="Button" id="mybutton" name="url button" value="Next" />
</a>
or you could handle this purely through Javascript and perform your navigation that way :
<!-- The onclick event will trigger a Javascript call to navigate -->
<input type="Button" id="mybutton" name="url button" value="Next" onclick="window.location.href='#Url.Action("YourAction","YourController")';" />

How to create an HTML button that show more text same page

I'm working with html and javascript. My problems is, in one webpage a show a plot and a few button. When the user press any of this button I need show 3 or 4 options but in the same page without switching pages.
Below is my code
<form action="MyPage">
<button type="submit" value="More Options">
</form>
redirect to an other page.What I can do?

First of all, get rid of type="submit". That's what's causing the page to do stuff you don't want. The second thing is to add an onclick handler. It should return false to avoid behavior like "submit". The variable 'this' will pass the button to your function, which you might need in that code. Then fill in the body of addMoreStuff() with your code to, well, add more stuff!
<form action="MyPage">
<button onclick="addMoreStuff(this); return false; ">More Options</button>
</form>
<script type="text/javascript">
function addMoreStuff(button) {
/* your code here */
}
</script>

Drop the form (use the button alone), and look into jQuery. It's extremely easy to use, and it'll help you quickly build code your application.
HTML
<button type="submit" value="More Options" id="more">
JavaScript (jQuery)
// run "add_options" when someone clicks on the button
jQuery('button#more').on('click', add_options)
function add_options() {
//code here to add more options
}

How to disable a submit button after one click?

I have this form inside a div and the submit button inside another div.
<div class="container1">
<form name="reg-form" id="signup" action="" method="post">
<div class="sep"></div>
<div class="inputs">
<input type = "submit" id="submit" name="submitkey" value="GENERATE KEY" />
</div>
</form>
</div>
How would I disable the submit button after one click? I tried every javascript code I find but it doesn't work on me. I dont know if it is because the form is inside a div and the submit button is inside another div. Thank you.

document.getElementById('signup').onsubmit = function() {
document.getElementById('submit').disabled = true;
};
Demo
The code should be put under the script, or wrapped inside a DOMContentLoaded/window.onload handler. Make sure your HTML does not have duplicated IDs.
Also, if the button must stay disabled after a page refresh/form submission, you will need cookies or a server-side session. None of these methods are foolproof though, and this is outside of the scope of the question I believe.

If you have jquery you can use this code:
$('#signup').submit(function(){
$('#submit').attr('disabled', 'disabled');
});

reset form element without reloading page

As you might guess I'm building a small chat system, and I would like that when the user clicks enter the message would be sent and the text area cleared.
I'm using this jquery:
jQuery('#my-form')[0].reset();
and it reloads the page which looks really noob.
any ideas?

$('#textbox1').val('');
Should clear a textbox

Assuming that your text-input/textarea is properly within a form, why not use:
<input type="reset" value="Clear the box" />
JS Fiddle demo.
Or:
<button type="reset">clear the text</button>
JS Fiddle demo.

html5 form submission issue

I have a piece of javascript which is initialized on the click of a button, and takes information from a form input to perform geolocation etc based on the data.
The issue I am having is that I have to place the button outside of the form in the html, otherwise when it is clicked, no javascript is fired!
This of course means that my users cannot hit enter in the offending text box (as they lose their data!)
Is there a way I can stop this from happening and be able to include the button in the form?
The HTML is:
<form>
<input id="addyInput" placeholder="Don't forget postcode!" size="25">
</form>
<button id="start" onclick="initialize()">Find Me!</button>
I can also include some of the javascript if needs be! (although that works fine!) :)
Thanks!

use :
<button id="start" onclick="return initialize()">Find Me!</button>
and then make sure initialize() returns false.