returns the link (href) at position x,y.
This is used in comination with bindlink to change the behaviour
of links.
eg.:
objectName bindlink <3> {puts [%W linkat %x %y]}
pathname bindlink ?event? ?sequence?
binds action to a certain event happening on a link
eg.:
objectName bindlink <3> {puts [%W linkat %x %y]}
pathname getdata ?options? url
gets data from a certain url