将逻辑绑定到 $。change（）并从 $。val（）获取当前值，以确定用户应该重定向到哪里。此示例假定一个位置直接存储在值本身中。

Bind the logic to the $.change() event, and get the current value from $.val() to determine where the user ought to be redirected to. This example assumes a location is stored directly in the value itself.

$(".mySelect").change(function(e){
  window.location = $(this).val();
});