Align at closing round bracket

The function of this online utility is to align at closing round bracket.

For example,

document.getElementById("input_textarea").oninput = ok;

document.getElementById("ok").onclick = ok;
document.getElementById("load_example").onclick = load_example;
document.getElementById("clear_input").onclick = clear_input;
document.getElementById("select_all").onclick = select_all;

will becomes:

document.getElementById("input_textarea").oninput = ok;

document.getElementById("ok"            ).onclick = ok;
document.getElementById("load_example"  ).onclick = load_example;
document.getElementById("clear_input"   ).onclick = clear_input;
document.getElementById("select_all"    ).onclick = select_all;

.