Loading Options on Select control on scroll event

[amirdhagopal]

I have a long list (say, 10,000) to be populated in the html select (Multiple with size, say 10 visible at a time) control. I don't want to populate all the items initially. Hence, Initially, I will load top 100 items and whenever user scrolls down and reaches the bottom of the list (say, after crossing 85th item), I want to populate the next 100 items (101th to 200th). I am using javascript to populate the options.

The question is:

1. How to identify that the user is reaching the bottom of the control?

Is there any way to identify whether a option is visible or not to the user?



Thanks in advance,

R. Amirdha Gopal.

[dxlwebs]

now thats something of a first for me never even heard about it!!!! but if i was to say something, i would most prob check out Ajax as Ajax seems to do everything you can think of!!