Lets say I have an element like this: <input id=options_14_text type=text onchange=something() name=options[14] value=>

Question

Asked: June 9, 20262026-06-09T09:00:31+00:00 2026-06-09T09:00:31+00:00

Lets say I have an element like this:

<input id="options_14_text" type="text" onchange="something()" name="options[14]" value="">

How could I change its id to options_15_text for example using Prototype?

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Editorial Team · Answer 1 · 2026-06-09T09:00:33+00:00

Editorial Team

You can select the element and then change its id property:

$("options_14_text").id = "options_15_text";

Or you could use writeAttribute:

$("options_14_text").writeAttribute("id", "options_15_text");

Here’s a working example. Inspect the DOM to see that the id value has changed.

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