i found 2 scripts so far, one that has check box and calculates only by checking one or multiple boxes (uses external .js) and the other one does the multiplication between the 2 values, uses input type "text" but it has a button for the function "do math"
the problem appears when i try to combine them...
pret.html this is the .js ...i had to change it to .html cause the forum would not let me upload it otherwise
script.html this is the file that uses the .js on top
calculator.html and this is the square cm calculator
what i was trying to do is, erase the top part from "script.html