Adding beforeCheckAll and beforeUncheckAll events
Adding beforeCheckAll and beforeUncheckAll events

GerHobbelt/jquery-multiselect,mcl-de/jquery-ui-multiselect-widget,r4j4h/jquery-ui-multiselect-widget,r4j4h/jquery-ui-multiselect-widget,GerHobbelt/jquery-multiselect,mcl-de/jquery-ui-multiselect-widget,GerHobbelt/jquery-multiselect,mcl-de/jquery-ui-multiselect-widget