Populate input fields on a web form

Discussion in 'Javascript' started by ero, Aug 11, 2006.

  1. ero

    ero Guest

    Is it possible to input values into a web form from an external source
    like a client-side javascript?

    There is a web site that I'm viewing where I have to enter 5 values in
    the form. 4 of the values don't change only one input field does. Is
    it possible to create a javascript to run which would popluate the
    non-changing values by executing the script or by pressing a button on
    the script?

    No experience at this so any examples would be helpful.

    ero, Aug 11, 2006
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  2. ero

    Randy Webb Guest

    ero said the following on 8/11/2006 3:32 PM:
    You want a bookmarklet. Search Google and the Archives.
    Randy Webb, Aug 11, 2006
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  3. ero

    Yanick Guest

    You could also use cookies that would populate the fields when the
    body.onload of you document is triggered. (But this requires cookies to
    be enabled.)

    If you're using server scripting, use session vars to set the value
    attribute of your input fields.
    Yanick, Aug 12, 2006
  4. ero

    Yanick Guest

    Randy Webb wrote:
    ..... I'm a little confused, honest, about suggesting bookmarklet from
    you. On this link : http://en.wikipedia.org/wiki/Bookmarklet , it
    explains that a bookmarklet is a "javascript:" pseudo-protocol, and yet
    http://www.javascripttoolbox.com/bestpractices/#onclick (a link from
    your post's signature) suggest that we should not use this, rather use
    the onclick event... There's no bad intentions behind this simple
    question, I'm just not sure how to relate...
    Yanick, Aug 12, 2006
  5. ero

    Randy Webb Guest

    Yanick said the following on 8/12/2006 12:21 PM:
    Fair enough. Read this entire post and at the bottom it explains why I
    suggested a bookmarklet instead of anything else.
    Yes, it uses the javascript: pseudo-protocol.
    The Best Practices document is totally, 100%, directed at code that is
    in a webpage. A Bookmarklet is nothing more than a saved Favorites that
    uses javascript to perform some action. Two different things entirely
    and as such the Best Practices document isn't applicable as you can't
    have a Favlet/Bookmarklet without the javascript: pseudo-protocol.
    A person who never asks questions never learns :)
    Think about your Bank's Website, or even Google Groups. Any site where
    you have to log in. You have a log in form that you have to fill out and
    then submit it. Let's say it looks like this:

    <form name="loginForm" action="somewhere" method="post">
    <input type="text" name="userName" value="">
    <input type="password" name="userPassword" value="">
    <input type="submit" value="Log In">

    Every time you open that page, you type in your username and password,
    click Log In. It's the same thing, over and over, every time you want to
    log in.

    Wouldn't it be easier, and neat, if you could just click a button/link
    and it fill it in for you? That's part of what a Favlet/Bookmarklet will
    let you do.

    Save the above HTML in a local file, then open the page. In the address
    bar of the browser, paste this snippet:


    Then press Go and it will fill in the form for you, automatically. You
    can save that snippet as a Favorites and then anytime you want to log
    in, you simply open the page, then open the script/Favlet and it will
    fill them in for you. You can add document.loginForm.submit() and it
    will even submit the form for you, with a simple click.

    Back to the OP's question, they wanted to fill out 4 inputs with the
    same input every single time. A bookmarklet is the only way to do that
    if you don't control the page it is on. If the page is your own, then
    you simply edit the HTML and set the value of the inputs.

    What they would have is a bookmarklet that looks something like this:

    document.formName.input1Name.value="value here";
    document.formName.input2Name.value="value here";
    document.formName.input3Name.value="value here";
    document.formName.input4Name.value="value here";

    I added the line breaks so that it would be wrapped where I wanted it
    wrapped, in a bookmarklet you can't have any line breaks, it is one long
    continuous string.

    Edit the form name and input names as they appear in the page in
    question, then you can add one more line:


    And it will put the focus in the one field you fill out manually.

    Then, every time you open the page, you click your Favlet and you only
    have one field to fill out. I have three of these on my Links bar in IE,
    one logs into my email account, one logs in to my bank account, and the
    third gives the browsers representation of the HTML of the page. All at
    the click of a single button. Pretty neat and powerful things they are.
    Randy Webb, Aug 12, 2006
  6. They are, but they are javascript pseudo-protocol URLs stored as a
    bookmark/favourite and activated by the individual user in order to act
    upon a page they are viewing.
    The specific recommendation is that javascript pseudo-protocol URLs
    should not appear in the HREF attribute of a link (which is where the
    onclick attribute is available as an equally reliable alternative and
    does not induce the negative side-effects of activating a javascript
    pseudo-protocol link (the browser getting the impression that is has
    been navigated and so that the current page is about to be replaced).

    Bookmarklets may have the same consequential side-effects, but they are
    employed on an individual basis by the browser user, and in a way that
    often makes the continued functionality of the web page being displayed
    insignificant. That is certainly true in this case where the desire is
    to enter values in form fields and then submit the form. The page
    actually will be replaced shortly after the activation of the bookmark
    so its continued functionality is not an issue.

    Richard Cornford, Aug 12, 2006
  7. Failing to quote (and top-posting) are often observed to coincide with a
    failure to read the material in the preceding post. Where the OP says
    "There is a web site that I'm viewing ..." (rather than "I have ...")
    the implication is that the question represent a personal desire to
    write known information into a fields of a form an a third party's web
    site, so you suggestions are irrelevant to the situation.

    Richard Cornford, Aug 12, 2006
  8. ero

    Yanick Guest

    Richard Cornford wrote :
    Well, thank you for pointing that out to me. I usually quote the
    message, but I guess this time I really missed the right statement in
    the question. It also explains the bookmarklet interrogation... My
    Yanick, Aug 13, 2006
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