Here is an example of the DISPLAY style property, and the visibility property

The display property makes an element invisible and allows the browser to reclaim the space that it occupied, the visibility property can be used to simply make an element disappear, but still reserve its space in the document

By calling a function to handle the onclick event of the button above, this content can be shown or hidden, but the space it occupies remains. The button's event handler simply sets this element's visibility property.