Javascript event that fires without user interaction?

Question

A textbox on my form may change depending on what\'s selected in various drop down lists.

Is there a way to call a javascript function when the textbox value changes? <

Answer 1

Assuming the frontend is in html:

You could install a timout callback and query the contents of the textbox in intervals of, say, 100msecs and compare it to some previous value you store in a variable.

Keywords: window.setTimout(), window.setInterval()