jsPlumb.bind('beforeDrop', function(ci){ // Before new connection is created

                var src=ci.sourceId;
                var con=jsPlumb.getConnections({source:src}); // Get all source el. connection(s) except the new connection which is being established
                if(con.length!=0 && $('#'+src).hasClass('exit'))
                    for(var i=0;i<con.length;i++)
                            jsPlumb.detach(con[i]);
                return true; // true for establishing new connection

        });