how can call value in jquery function in onclick

Question

I want add value in jquery function an post it to my php file. I call my jquery function whit onclick event but i don't know how can add value. I have this input tag:

 <input type="hidden" name="code" id="code" value="<?php echo $code; ?>"  />

and my onlick event this is:

<span onClick="previewed_files(); checkDb();">start</span>

and my checkDb function it is:

    <script type="text/javascript" >

    function checkDb(adscode){
        $.post('myphp.php',{adscode: adscode},function(data){
            $('#mydiv').html(data);}

                        );
            }
  </script>

now I can't call value from input by id code in my checkDb() function in onclick event. please help me. thank you

Answer 1

Here :

<script type="text/javascript" >
function checkDb(adscode){
    $.post('myphp.php',{adscode: adscode, value: $('#code').val()},function(data){
        $('#mydiv').html(data);});
}
</script>

Answer 2

You must check for ajax tutorials to get value in php. You cant get parameter value in function untill you pass in the function.

to get value of hidden variable -

var value = jQuery('#code').val();

Now, you can use this variable in your funciton.