Jqueryselect (list) operation (value/value assignment) _ jquery

Jquery has a lot of trouble with the & lt; select & gt; operations. I collect the following Frequently Used operations: 1. obtain the selected value: $ ("# xmzt option: selected "). val () // xmzt is Id 2. Set the selected item: $ ("select [@ id = 'pagesize _ slt']") [0]. selectedIndex = 1 ;//-----The index starts from 0, so 1 is the second item.

It is strange that I use id to obtain a unique value, but $ ("select [@ id = 'pagesize _ slt']"). selectedIndex = 1; No. You must add [0]. That is to say, $ ("select [@ id = 'pagesize _ slt']") returns an array. Note This.