**1. Add/remove options of Select in jQuery: **2. $(” # select_id ”). Append (” < The option value = ‘value’ > Text< / option>” );     // appends an Option(drop-down item)  to Select; 3. $(” # select_id ”). The prepend (” < The option value = ‘0’ > Please select < / option>” );     // inserts an Option(first position)  4. $(” # select_id option: last ”). The remove ();     // deletes the largest Option(the last one)  5. $(” # select_id option [index = ‘0’] ”). The remove ();     // deletes Option(the first one) with index value of 0 in Select   6. $(” # select_id option (value = ‘3’] ”). The remove ();     // delete Option  Value=‘3’ from Select; 7. $(” # select_id option [text = ‘4’] ”). The remove ();     // delete Option  Text=‘4’ from Select; 8. $(” # select_id ”). The empty (); // clears the option in the select  

**1. JQuery gets the Text and Value of Select: **2. $(” # select_id ”). Change (function () {/ / code… });       // adds an event to the Select, which is triggered when one of the items is selected 3. The var checkText = $(” # select_id ”). The find (” option: selected ”). The text ();     // gets the Text  Select; 4. Var checkValue = $(” # select_id ”). Val ();     // gets Value  Select; 5. The var checkIndex = $(” # select_id ”). The get (0). SelectedIndex;     // gets the index value of the Select selection 6. Var maxIndex = $(” # select_id option: last ”). The attr (” index ”);     JQuery set the Text and Value of Select Select: