禁用下拉列表后，如何将选定的下拉列表项存储在变量中？

I need to store the selected item of dropdownlist into database and after selecting it the dropdownlist should be disabled....

My problem is before disabling it am able to store the selected option. but after disaling am unable to retrieve the selected option into a variable.so that i can store it in db.....

if you use disabled input and need to be value send, add

<input type="hidden" name="input-name" value="value-to-be-send">

to your form

You can use Ajax - here jQuery:

$(function() {
  $("#mysel").on("change",function() {
    if (this.selectedIndex>1) { // something selected 
      $.post("dbsave.php",{"sel":$(this).val()},function() {
        ("#mysel").prop("disabled",true);
      });
    }
   });
 });