Question

Get all elements like this without jQuery

<input type="checkbox" name="IB_PROPERTY_415_DEL" id="IB_PROPERTY_415_DEL" value="Y">
<input type="checkbox" name="IB_PROPERTY_417_DEL" id="IB_PROPERTY_417_DEL" value="Y">

Where 415 changing every iteration, with whole values (414, 416, etc)
Other checkbox with other names exist on page
I needs one time solution, for console script

Answer 1

Use a loop?

var elements = [];
for (var i=415; i<418; i++)
    elements.push(document.getElementById("IB_PROPERTY_"+i+"_DEL"));

(The unique identifier should be enough)

If you don’t know the ids, you could try this:

var inputs = document.querySelectorAll("input[type=checkbox][value=Y]");
var elements = [];
for (var i=0; i<inputs.length; i++)
    if (inputs[i].name == inputs[i].id && /^IB_PROPERTY_\d{3}_DEL$/.test(inputs[i].id))
        elements.push(inputs[i]);

(Note that document.querySelectorAll won’t work in all browsers, see @Matt’s solution for a better way)