Simple plugin for jQuery for dropdown layers
v0.1 09/06/2014 initial version
v0.2 17/07/2014 rewrote js to coffescript and added option `disableDropdownClass` for custom disabling of dropdown item
v0.3 27/11/2015 Added new options: 'slideUpSpeed', 'slideDownSpeed', 'useSlideDown','useSlideUp','transitionEffect','callOnCompleteHide', 'callOnCompleteShow'
Test page 5th element is disabled, try to resize window with active layer: http://viktoraksionov.github.io/jquery-plugin-dropdownLayer/dist/html/index.html