i have a javscript to get checked text value from checkboxlist but im gettin "on" as a value instead of it's text

Latest Revision
My Code:

<script type="text/javascript" language="javascript">
             function GetTextValue() {
  var checkList = document.getElementById('CheckBoxList1');
                     var checkBoxList = checkList.getElementsByTagName("input");
                     var checkBoxSelectedItems = new Array();
                     var values = "";
                     var i = 0;
                     for (i = 0; i < checkBoxList.length; i++) {
                         if (checkBoxList[i].checked) {
                             checkBoxSelectedItems.push(checkBoxList[i].value);
                             values = values + checkBoxList[i].value + ",";
                             alert('checked - checkBoxList[i]: ' + checkBoxList[i].value)
                         }
                     }
                     var category = values;
}
</script>

For example if i select three check box then it shows like this "on, on, on"