Handles the content of a HTML element. It sets the content of the element when the Content parameter is provided or it returns the value when the parameter is omitted
Parameters
ID: string
The id of the element for which we want to get/set the value.
optionalContent: string
The content/inner HTML to give to the element (if applicable)
Returns string
The content of the element (When no Content parameter was passed to the function)
Handles the content of a HTML element. It sets the content of the element when the Content parameter is provided or it returns the value when the parameter is omitted