javascript - How to change the value of hidden input field before submitting - Stack Overflow

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I have a Feedburner subscription form with two buttons, one for daily news and one for weekly news. The question is how to change the value of hidden input field with name 'uri' before submitting? My solution doesn't work.

This is what I try to use:

<form id="feedburner" action=""
    method="post" target="popupwindow">
    <p>
        <input autoplete="off" value="Enter your email…"
            onblur="if (this.value == '') {this.value = 'Enter your email…';}"
            onfocus="if (this.value == 'Enter your email…') {this.value = '';}"
            type="text" name="email"/>
        <input type="hidden" name="uri"/>
        <input type="hidden" name="loc" value="en_US"/>
    </p>

    <input type="submit" value="Daily" onsubmit="document.getElementsByName('uri').value = 'androidinfodaily'; window.open('', 'popupwindow'); return true" checked> 

    <input type="submit" value="Weekly" onsubmit="document.getElementsByName('uri').value = 'androidinfoweekly'; window.open('', 'popupwindow'); return true">

</form>

---

Solved

I have fixed my code and now it works. This is the final variant:

<form id="feedburner" action=""
    method="post" target="popupwindow">
    <p>
        <input autoplete="off" value="Enter your email…"
            onblur="if (this.value == '') {this.value = 'Enter your email…';}"
            onfocus="if (this.value == 'Enter your email…') {this.value = '';}"
            type="text" name="email"/>
        <input type="hidden" name="uri" />
        <input type="hidden" name="loc" value="en_US"/>
    </p>

    <input type="submit" value="Daily" onclick="document.getElementsByName('uri')[0].value = 'androidinfodaily'; window.open('', 'popupwindow'); return true"> 

    <input type="submit" value="Weekly" onclick="document.getElementsByName('uri')[0].value = 'androidinfoweekly'; window.open('', 'popupwindow'); return true">

</form>

I have a Feedburner subscription form with two buttons, one for daily news and one for weekly news. The question is how to change the value of hidden input field with name 'uri' before submitting? My solution doesn't work.

This is what I try to use:

<form id="feedburner" action="https://feedburner.google./fb/a/mailverify"
    method="post" target="popupwindow">
    <p>
        <input autoplete="off" value="Enter your email…"
            onblur="if (this.value == '') {this.value = 'Enter your email…';}"
            onfocus="if (this.value == 'Enter your email…') {this.value = '';}"
            type="text" name="email"/>
        <input type="hidden" name="uri"/>
        <input type="hidden" name="loc" value="en_US"/>
    </p>

    <input type="submit" value="Daily" onsubmit="document.getElementsByName('uri').value = 'androidinfodaily'; window.open('https://feedburner.google./fb/a/mailverify?uri=androidinfodaily', 'popupwindow'); return true" checked> 

    <input type="submit" value="Weekly" onsubmit="document.getElementsByName('uri').value = 'androidinfoweekly'; window.open('https://feedburner.google./fb/a/mailverify?uri=androidinfoweekly', 'popupwindow'); return true">

</form>

---

Solved

I have fixed my code and now it works. This is the final variant:

<form id="feedburner" action="https://feedburner.google./fb/a/mailverify"
    method="post" target="popupwindow">
    <p>
        <input autoplete="off" value="Enter your email…"
            onblur="if (this.value == '') {this.value = 'Enter your email…';}"
            onfocus="if (this.value == 'Enter your email…') {this.value = '';}"
            type="text" name="email"/>
        <input type="hidden" name="uri" />
        <input type="hidden" name="loc" value="en_US"/>
    </p>

    <input type="submit" value="Daily" onclick="document.getElementsByName('uri')[0].value = 'androidinfodaily'; window.open('https://feedburner.google./fb/a/mailverify?uri=androidinfodaily', 'popupwindow'); return true"> 

    <input type="submit" value="Weekly" onclick="document.getElementsByName('uri')[0].value = 'androidinfoweekly'; window.open('https://feedburner.google./fb/a/mailverify?uri=androidinfoweekly', 'popupwindow'); return true">

</form>

• javascript
• jquery
• html
• forms

Share Improve this question Follow edited May 1, 2018 at 16:03 Cœur 38.8k2626 gold badges205205 silver badges277277 bronze badges asked Jul 20, 2015 at 11:48 IurieIurie 2,25833 gold badges2626 silver badges4343 bronze badges 0

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3 Answers 3

Sorted by: Reset to default 5

The submit event is fired on the form element, not on submit button, so use click handlers

Note that submit is fired only on the form element, not the button or submit input. (Forms are submitted, not buttons.)

<form id="feedburner" action="https://feedburner.google./fb/a/mailverify"
    method="post" target="popupwindow">
    <p>
        <input autoplete="off" value="Enter your email…"
            onblur="if (this.value == '') {this.value = 'Enter your email…';}"
            onfocus="if (this.value == 'Enter your email…') {this.value = '';}"
            type="text" name="email"/>
        <input type="hidden" name="uri"/>
        <input type="hidden" name="loc" value="en_US"/>
    </p>

    <input type="submit" value="Daily" onclick="document.getElementsByName('uri')[0].value = 'androidinfodaily'; window.open('https://feedburner.google./fb/a/mailverify?uri=androidinfodaily', 'popupwindow'); return true" checked> 

    <input type="submit" value="Weekly" onclick="document.getElementsByName('uri')[0].value = 'androidinfoweekly'; window.open('https://feedburner.google./fb/a/mailverify?uri=androidinfoweekly', 'popupwindow'); return true">

</form>

---

Also it will be better to speprate the script to a function like

<form id="feedburner" action="https://feedburner.google./fb/a/mailverify" method="post" target="popupwindow">
    <p>
        <input autoplete="off" value="Enter your email…" onblur="if (this.value == '') {this.value = 'Enter your email…';}" onfocus="if (this.value == 'Enter your email…') {this.value = '';}" type="text" name="email" />
        <input type="hidden" name="uri" />
        <input type="hidden" name="loc" value="en_US" />
    </p>
    <input type="submit" value="Daily" onclick="return beforeSubmit('androidinfodaily')" checked />
    <input type="submit" value="Weekly" onclick="return beforeSubmit('androidinfoweekly')" />
</form>

then

function beforeSubmit(type) {
    document.getElementsByName('uri')[0].value = type;
    window.open('https://feedburner.google./fb/a/mailverify?uri=' + type, 'popupwindow');
    return true
}

You can have click event handler for button and change type of button to type="button" so that it will not submit the form directly. Inside click handler assign balue to uri input and then submit the form.

HTML:

<form id="feedburner" action="https://feedburner.google./fb/a/mailverify"
    method="post" target="popupwindow">
    <p>
        <input autoplete="off" value="Enter your email…"
            onblur="if (this.value == '') {this.value = 'Enter your email…';}"
            onfocus="if (this.value == 'Enter your email…') {this.value = '';}"
            type="text" name="email"/>
        <input type="hidden" name="uri"/>
        <input type="hidden" name="loc" value="en_US"/>
    </p>

    <input type="button" value="Daily" id="daily"> 

    <input type="button" value="Weekly" id="weekly">

</form>

jQuery:

$(function(){
   $('#daily').click(function(){
      $('input[name="uri"]').val('androidinfodaily');
      window.open('https://feedburner.google./fb/a/mailverify?uri=androidinfodaily', 'popupwindow');
      //submit form
      $('#feedburner').submit();
   });

   $('#weekly').click(function(){
    $('input[name="uri"]').val('androidinfodaily');
      window.open('https://feedburner.google./fb/a/mailverify?uri=androidinfoweekly', 'popupwindow');
      //submit form
      $('#feedburner').submit();
  });
});

do not forget [0] for the first element:

document.getElementsByName('uri')[0].value = 'androidinfodaily';

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