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              <form id="test" action="#" method="post">
    <div class="form-group">
        <label for="name">Name</label>
        <input class="form-control" type="text" name="name" id="name" />
    <div class="form-group">
    	<label for="check">Check if you like JavaScript</label>
    	<input type="checkbox" name="check" value="yes" />
    <div class="form-group">
    	<label for="select">Select your favorite JavaScript framework</label>
    	<select name="select" class="form-control">
    		<option value="none" selected="selected">None</option>
    		<option value="jquery">jQuery</option>
    		<option value="angularjs">Angular</option>
    		<option value="mine">Mine, of course!</option>

    <div class="form-group">
    	<label for="message">Leave a message</label>
    	<textarea class="form-control" name="message" rows="15" cols="30"></textarea>
    <div class="form-group">
        <label for="email">Email</label>
        <input class="form-control" type="text" name="email" id="email" />
    <div class="form-group">
        <label for="password">Password</label>
        <input class="form-control" type="password" name="password" id="password" />
        <input type="submit" value="Send" class="btn btn-primary btn-block" />
<pre id="output"></pre>

              body {
  margin: 2em auto;
  max-width: 600px;

form div {
    margin-bottom: 0.5em;
form div label, form div input {
    display: block;
    margin-bottom: 0.3em;

              (function() {
	function toJSONString( form ) {
		var obj = {};
		var elements = form.querySelectorAll( "input, select, textarea" );
		for( var i = 0; i < elements.length; ++i ) {
			var element = elements[i];
			var name = element.name;
			var value = element.value;

			if( name ) {
				obj[ name ] = value;

		return JSON.stringify( obj );

	document.addEventListener( "DOMContentLoaded", function() {
		var form = document.getElementById( "test" );
		var output = document.getElementById( "output" );
		form.addEventListener( "submit", function( e ) {
			var json = toJSONString( this );
			output.innerHTML = json;

		}, false);


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