function test_func (obj_slc) { var slc_name = obj_slc.id; alert( $('#' + slc_name).children(':selected').val() ); alert( $('#' + slc_name).children(':selected').text() ); } <select id="slc_0001" onchange="test_func(this);"><option value="1">aaa</option><option value="2">bbb</option></select>