button.nomargin(@click="gotoPrevNext($event,curproblem,1)")
| {{ st.tr["Previous"] }}
button.nomargin(@click="gotoPrevNext($event,curproblem,-1)")
button.nomargin(@click="gotoPrevNext($event,curproblem,1)")
| {{ st.tr["Previous"] }}
button.nomargin(@click="gotoPrevNext($event,curproblem,-1)")