Trigger Button in Html

[liron]

Hi,

I would like to create a java code that connect to Html and does several things:
1. How ca i trigger a click on a button in the html?
2. When the button is pressed the html is exporting the data to an excel file by
popup a window (open, save, close window).
how can i cause the html not to open the popup window and always save the file,
or export the data to the java client.

Thanks