问题
It's probably easiest to view this fiddle: http://jsfiddle.net/Ahfm7/4/
Only the agent and extension values in the dropdown have been implemented at this time.
I have encountered a couple of bugs I was hoping someone could help figure out.
The first is when you add a new row of dropdowns without selecting anything in the first and proceed to select an option in the second one, the form can be submitted.
Likewise if you pick an option in the first row, then add another and remove it, the submit button remains disabled.
I was just wondering if anyone knows how to fix this?
回答1:
I started cleaning up the code. I cut the 700+ lines of JS down to something more manageable for SO, but you should be able to understand the general idea.
http://jsfiddle.net/mattball/5ubTe/
In general:
- Avoid re-querying the DOM by caching jQuery objects
- Stay DRY by writing more, smaller functions which contain commonly reused logic (such as the
enableSubmitButtonfunction I added) - Don't forget to use
var
回答2:
I finally almost have a complete working solution but with one bug:
http://jsfiddle.net/5ubTe/72/
Thanks for your advice.
来源：https://stackoverflow.com/questions/5790975/disabling-and-re-enabling-dynamic-form-elements-with-jquery