问获取以下HTML代码的javascript函数中的输入并选择值

EN

var inputs = document.getElementsByClassName('internship[source][]');
for(var i=0; i<inputs.length; i++)
   console.log(inputs[i].value);

 <input type="checkbox" class="internship[source][]" name="internship[source][]" value="S1" checked="">&nbsp;S1
<input type="checkbox" class="internship[source][]" name="internship[source][]" value="S2" checked="">&nbsp;S2
<input type="checkbox" class="internship[source][]" name="internship[source][]" value="S3" checked="">&nbsp;S3

<div class="elgg-sidebar">
  <h3><b>Source: </b></h3>
  <input type="checkbox" id="internship[source][1]" name="internship[source][]" value="S1" checked="">&nbsp;S1
  <input type="checkbox" id="internship[source][2]" name="internship[source][]" value="S2" checked="">&nbsp;S2
  <input type="checkbox" id="internship[source][3]" name="internship[source][]" value="S3" checked="">&nbsp;S3

  <h3><b>Internship Type: </b></h3>
  <input type="checkbox" id="internship[int_wrk_typ][]" name="internship[int_wrk_typ][]" value="WT1" checked="">&nbsp;WT1
  <input type="checkbox" id="internship[int_wrk_typ][]" name="internship[int_wrk_typ][]" value="WT2" checked="">&nbsp;WT2
  <input type="checkbox" id="internship[int_wrk_typ][]" name="internship[int_wrk_typ][]" value="WT3" checked="">&nbsp;WT3

  <h3><b>Location: </b></h3>
  <select style="width:200px;padding: 5px;font-size: 1.1em;color: #666;border: 1px solid #ccc;-webkit-border-radius: 5px;-moz-border-radius: 5px;border-radius: 5px;-webkit-box-sizing: border-box;-moz-box-sizing: border-box;box-sizing: border-box;" name="int_location"
  id="internship[int_location]">
    <option value="%">Any</option>
    <option value="Work from Home">Work from Home</option>
    <option value="Loc1">Loc1</option>
    <option value="Loc2">Loc2</option>
  </select>

  <h3><b>Dates: </b></h3> Start Date:
  <input value="" type="text" name="int_start" id="internship[int_start]" class="elgg-input-date popup_calendar" data-datepicker-opts=""> End Date:
  <input value="" type="text" name="int_end" id="internship[int_end]" class="elgg-input-date popup_calendar" data-datepicker-opts="">

  <h3><b>Keywords: </b></h3>
  <input value="" type="text" name="keyword" id="internship[keyword]" class="elgg-input-text">

  <input type="button" onclick="onClick_Search()" class="elgg-button elgg-button-submit" value="Search">&nbsp;&nbsp;
  <input type="button" onclick="onClick_Reset()" class="elgg-button elgg-button-delete float-alt" value="Reset">
</div>

alert(document.getElementById("internship[source][1]").value);

$(document).ready(function(){
var elements = $('*[id^="internship"]'); // get all inputs starts with internship
    $.each(elements, function( index, element ) { // loop over it
    console.log( index + ": " + element.value ); // element.value gives the values one by one
    });
});

$(document).ready(function(){
var elements = $('*[id^="internship"]').map(function() {
    return $(this).attr("value");
  }).get().join();
  alert(elements);
});