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Editorial Team
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Asked: 2026-06-15T07:47:31+00:00

I have a very simple form with three fields that I need to submit

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I have a very simple form with three fields that I need to submit to an mvc action. The form must be application/x-www-form-urlencoded. however, one of the fields is populated by users copying and pasting an already urlencoded value. I would like to decode that value prior to submitting the form. this seems really simple but I keep running into proplems with my javascript.

Here is the code:

   <html>
    <head>
<script>
function decodeURI()
{
decodeURIComponent(document.createprofile.URI.value);
}
</script>
    <title>Test Create</title>
    </head>
    <body>
    <center>
    <h1> Spoof Profile Calls </h1>
    <hr>
    <div style="border: 1px solid black; width: 300px;">
    <b>Create</b>
    <form method="post" action="https://test.test-lab.com/Profile/Create/" name="createprofile">
    <input type="hidden" name="ReturnURL" value="self.close()">
    UserName: <input type="text" name="UserName"><br />
    Client: <input type="text" name="Client"><br />
    URI: <input type="text" name="URI" onblur="decodeURI();"><br />
    <input type="submit" formenctype="application/x-www-form-urlencoded" value="Go To - Create"><br />
    </form>
    </div>
    </body>
    </html>

The URI field is the one that needs url decoded prior to submission because it gets reencoded and thus corrupted. I could ask the users to un-encode these values themselves but they are not terribly sophisticated users and it will likely not happen.

Thank you in advance!

UPDATED WITH FAILING CODE

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1 Answer

  1. Editorial Team

    Replace the line

    URI: <input type="text" name="URI" onblur="decodeURI();"><br />

    by

    URI: <input type="text" name="URI" onchange="decodeURI(this);"><br />

    And do something like

    function decodeURI(elm) {
    elm.value = 'foo ' + elm.value + ' bar';
    return false;
}
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