new helpFrame()
var h = new helpFrame(left,top,width,height,<refDiv>)
creates a helpFrame with the specified size and position, optionally
specified as percentages, optionally relative to a previously defined
DHTML element. Like all MapClient objects, its internal layout properties
can be reached by its "div" property, like h.div.style. A helpFrame
has several subelements, e.g. titleBar, titleText and textArea.
These are regular DOM elements, so their appearance can be changed, e.g.
"h.textArea.style.backgroundColor".
A helpFrame responds to moving and minimizing (by just clicking
the titlebar), but not to resizing.
A helpFrame with just the size
of the titlebar can be used to navigate through an application without
accompanying text. In that case "addPage()" can be called with
null as first parameter.
Once a helpFrame is created, it has to be filled in by the "addPage()"
method. Each page can contain both text, Javascript DOM variables or MapClient
objects like windows and menus.
When selecting a page, only objects belonging to that page will be shown.