How to get multiple checkbox values using jQuery?

Try this

<input name="selector[]" id="ad_Checkbox1" class="ads_Checkbox" type="checkbox" value="1" />
<input name="selector[]" id="ad_Checkbox2" class="ads_Checkbox" type="checkbox" value="2" />
<input name="selector[]" id="ad_Checkbox3" class="ads_Checkbox" type="checkbox" value="3" />
<input name="selector[]" id="ad_Checkbox4" class="ads_Checkbox" type="checkbox" value="4" />
<input type="button" id="save_value" name="save_value" value="Save" />

function

    $(function(){
      $('#save_value').click(function(){
        var val = [];
        $(':checkbox:checked').each(function(i){
          val[i] = $(this).val();
        });
      });
    });

To get an array of values from multiple checked checkboxes, use jQuery map/get functions:

$('input[type=checkbox]:checked').map(function(_, el) {
    return $(el).val();
}).get();

This will return array with checked values, like this one: ['1', '2']

Here is working example on jsfiddle: http://jsfiddle.net/7PV2e/