JQuery BUG: $. attr (& amp; quot; selected & amp; quot;, tru

Jquery version: 1.10.2

Google chrome can be executed normally.

IE11 and FIREFOX 26 have bugs.

Test 1Test 2Test 3Test 4

To submit multiple options to the server, select all options first. However, when $ ("# id123 option"). attr ("selected", true) of JQUERY is executed, a BUG is easily found and is recorded here.

BUG reproduction: Click the option manually (the option may be sorted), and then click $ ("# id123 option") of JQUERY "). attr ("selected", true), all option source code will be set selected = "selected", but the selection is not highlighted, then submit the server, only values in the highlighted status are received.

Solution: Return to JAVASCRIPT

Var sel = document. getElementById ("id123 ");
For (var I = 0; I <sel. options. length; I ++ ){
Sel. options [I]. selected = true;
}