Script command lines are performed from top to bottom, and operations result leftward:
x = 7 // sets a variable named x equal to equal 7;
y = x + 2 // sets a variable named y equal to 9 (7+2);
The double slash (//) is used to comment code. Whatever is between the // and the end of the line is ignored, linebreaks will cause errors (see tips).
It is advisable to end lines with semicolons (;) although not neccessary. Semicolons can also be used to divide commands on the same line:
x = 7 ; y = x + 2 // like so;
Events are activated by actions of people viewing the page. Scripts can change page characteristics when the select box clicks and/or moves across links and form inputs.
Scripts can be set off by the time since an event, or since the page's download.