Application Express :: How To Get Checkbox Value When List Value Changed In Classic Report

I worked with apex 4.2 and i create normal classic report with one checkbox column and one column change it to select list(named loved) now i want when user change list take value of checkbox item and show it in message .

SQL for report

{
SELECT
'<INPUT TYPE="checkbox" NAME="f01" VALUE="'
||SEQ
||'">' SEQ,
ID,
DEPT_NO,
EMP_NAME}

i change the column attributes of Dept_NO to Display as Select list of department name (named lov). Now i want when user change name of department the value of SEQ SHOW IN ALERT MESSAGE

i create JavaScript on the page

function test(pThis) {
var f01_value = $('select[name="f01"]').value;
alert('#SEQ : '+ f01_value);
}
</script>

I call this javascript function when list change but the value undefined..

My Question :

How can get this value Or any value of item in reports ?