Hello everybody, I want to add a clock which shows the system time to a pdf file. And I have read the ``art-calc.pdf'' and ``mwidget-p.pdf'' to find some approaches but failed shamely. I am indeed new at ConTeXt and JavaScript. Before I'm shocked by ConTeXt, I used LaTeX for about 2 years, so I'm confused with the conventions between ConTeXt and LaTeX. My code is here: ---------------------------------------------------------------------------------- \setupinteraction[state=start] \startJSpreamble functions used now function do_digit(d) { Stack[Level] += String(d); do_refresh(Level) } \stopJSpreamble \startJScode{digit} do_digit(JS_S_1); \stopJScode \definefield[Stack.1][line][Results][][ \setupfield [Results] [horizontal,frame] [width=fit, height=2cm, frame=on] [height=18pt,width=80pt,align=middle,frame=off] [height=18pt,width=80pt,color=red,align=right,style=type,frame=off] \setupbuttons [background=infobutton] \starttext Click \button{7}[JS(digit{7})] will get \field[Stack.1] \stoptext -------------------------------------------------------------------------------- I only copied these codes from "art-calc.pdf" so there must be some other critical concepts that I haven't realized. Please point them to me. Thanks