How get DOM elements with a regular expression in javascript?

Question

For example, I want all the elements with an ID "hide_" + a value. This function must to return "hide_1" and "hide_30", etc, depending of the elements of the page.

Answer 1

Have a look at dollar-dollar syntax:

$$('a[id^="hide_"]')

should get you anchors whose IDs start with 'hide_'.

Most CSS3 is supported from Prototype 1.5.1 +.