Hello friends!

I would make an educational website with exercises together with arrows. 

What I do is something like this but in html5

http://www.juegos.educ.ar/matematica/165-unir-con-flechas.html

I'm a little lost and a little rusty with javascript.

Anyone can help me to address this issue with jquery or any book that can help me with these concepts.

thank you very much friends!

PD: Sorry for my English.