JQuery嵌入了php echo。 没有成功

Hello i want to use Jquery ajax

echo "$(document).ready(function() {
          $(\"#submit\").click(function(){
                var n = $(\"#n\").val();  

                jQuery.ajax({
                    type: \"GET\",
                    url: \"function.php\",
                    data: \"n=\"+n,
                    success: function(results)
                    {
                        alert(n);                       

                    }
               });
          });
      });";

but never it shows the alert(n);

Can you help me?

Edit: I try to do it with only js but dont work too.. here is it.

<script>
  var n = $('#n').val(); 
  $(document).ready(function() {
    $('#submit').click(function(){
      var n = $("#n").val();

      $.ajax({
        type: 'GET',
        data: "n=" + n,
        url: 'function.php',
        success: function (results) {
            alert(results);
            alert("some");
        }
      });
    });
  });
</script>

<form action='' method='post'>
  <select name='n'  id='n'>
    <option value='Lusiana'>Lusiana</option>
  </select>
  <input id='submit' name='submit' type='submit' value='Go'>
</form>

I'm using this code: https://github.com/papalevski/jQuerySlider/tree/master/jQuerySlider

the php is:

<?php
  $n = ( isset($_GET['n']) ? $_GET['n'] : "");
  echo $n;
?>

please, indent your code, it will be less difficult to read, data should be sent like data: {n:"value"}, in your case i think this must work data:{n:\""+n+"\"},

echo "$(document).ready(function() {
          $('#submit').click(function(){
              var n = $('#n').val();  
              jQuery.ajax({
                  type: 'GET',
                  url: 'function.php',
                  data: {n:n},
                  success: function(results){                      
                      alert(n)
                  }
              });
          });
      });";

Place your script code inside Nowdocs block, It will be more easier for you to read and/or debug,

The benefit is, you don't have to escape those characters as double quotes and/or single quotes.

Read about it more here

$now = <<<'SCRIPT'

$(document).ready(function() {
    $("#submit").click(function() {
        var n = $("#n").val();

        jQuery.ajax({
            type: "GET",
            url: "function.php",
            data: "n=" + n,
            success: function(results) {
                alert(n);

            }
        });
    });
});

SCRIPT;