Forum

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var data = 'pag='+ $('#pag').val();

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$('#pag').val()

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document.querySelector('#pag').value

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<select name="pag" id="pag">
  <option value="altu">Altu</option>
  <option value="php">PHP</option>
  <option value="ajax">Ajax</option>
 </select>

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<input type='text' id='pag' value='valoare' name='nume' />
<script>
alert($('#pag').val());
</script>

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$('#crs').submit(function() {
    // preia datele din formular
    var nm = $('#crs #nm').val();
    var cs = $('#crs #cs').val();
    var cmt = $('#crs #cmt').val();

    // pune date din formular in format JSON, care va fi trimis la server
    var data_json = {'nm':nm, 'cs':cs, 'cmt':cmt};
  .....
  
  
 <form action="script.php" method="post" id="crs">
 	Nume: <input type="text" name="nm" id="nm" /><br />
 	Curs: <select name="cs" id="cs">
  			<option value="altu">Altu</option>
  			<option value="php-mysql">PHP-MySQL</option>
  			<option value="javascript">JavaScript</option>
  			<option value="actionscript">ActionScript</option>
  			<option value="jquery">jQuery</option>
 		</select><br />
 	Comentarii:<br />
 		<textarea name="cmt" id="cmt" cols="20" rows="3"></textarea>
 	<input type="submit" value="Trimite" />
</form> 

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$('#form_id').submit(function(){
  //code executed when form #form_id is submited
});