Getting selected check box value in php

I am selecting check box value but i want to print that value on the same page (without submitting).

<script type="text/javascript">
$(document).ready(function() {
    var selected_value = []; // initialize empty array 
    $(".source:checked").each(function(){
        //selected_value.push($(this).val());
        alert($(this).val());
    });
    //alert(selected_value); //Press F12 to see all selected values
});
</script>

<input class="source" type="checkbox" name="type" value="4" />
<input class="source" type="checkbox" name="type" value="3" />
<input class="source" type="checkbox" name="type" value="1" />
<input class="source" type="checkbox" name="type" value="5" />

But above code does not seem to be working. How is it possible?