addMarker

A method to add a marker to a map location.

Parameter	Value
id: string	Identity of object.
point: a point set object (SWPoint) -or- point: a point set array	isn93 map point locations.
text: string	Title of marker.
url (to image file)	Image of marker.

Return	Value
object:	A marker object.

Example:

var marker = map.addMarker("house",
SWPoint.create(359583, 406481),
"Samsyn", "http://kort.samsyn.is/api/img/house.png");