Slide-Animations & Minor Changes

$.filter.filter -> $.filter.byFunction
animation's .think() get the percentage as an argument
animation's need to be startet by .start() and can be easily killed via
.quickEnd()
$.getTop and $.getLeft return the left and top offset from an element to
the vierwport
$.computedStyle (or short $.cs) return the computed style object of an
element
$.isHidden returns wether an element is visible to the user or not
few changes
bug
cleanup