var wedges = Array('http://www.uwelal.de/color_schemes/grey/grau16.png', 'http://www.uwelal.de/color_schemes/grey/grau24a.png', 'http://www.uwelal.de/color_schemes/grey/grau24b.png', 'http://www.uwelal.de/color_schemes/grey/grau32.png');