select the operation option

jQuery get Text and Value Select choice: 

code show as below:

$ ( "# select_id") change (function () {// code ...});. // add an event to Select, select one when the trigger 
var checkText = $ ( "# select_id ") find (. "option: selected") text ( ); // get selected select text. 
var CheckValue = $ ( "# select_id") Val (); // Gets Value select choice. 
var checkIndex = $ ( "# select_id") .get (0) .selectedIndex; // get the index value selected select 
var maxIndex = $. ( "# select_id option: last") attr ( "index"); // select obtain maximum index value 

 

jQuery add / delete Select the Option key: 

$ ( "# select_id") append ( "<option value = 'Value'> Text </ option>");. // append to a Select Option (dropdown) 
. $ ( "# select_id") The prepend ( "< option value = '0'> select </ option> "); // insert a Option (first position) of select 
$ (" # select_id Option: Last ") remove (); // delete select index. the maximum value Option (last) 
$ ( "# select_id Option [index = '0']") remove ();. // delete the index value Select Option 0 (first) 
$ ( "# select_id Option [ value = '3'] ") remove ();. // delete Select the value = '3' of the Option- 
$ (" # select_id Option [text = '. 4'] ") remove ();. // delete Select the Text = '4' of Option 

 

Empty the contents: 

$("#charCity").empty();