Returns the inner height of an element in pixels, including padding but not the horizontal scrollbar height, border, or margin.
clientHeight can be calculated as CSS
height + CSS
padding - height of horizontal scrollbar (if present).
Syntax and values
var h = element.clientHeight;
h is an integer representing the
clientHeight of element in pixels.
clientHeight is read–only.
Not part of any W3C specification.
clientHeight is a non-standard property, which was introduced in Internet Explorer object model.