Select all text in an HTML element

select-text.js

function selectAllText(elem) {;
    var range = document.createRange();
    range.setStart(elem, 0);
    var i = 0;
    while (i < 999999) { // could have used 'true', but I don't like the infinite loop
        try {
            range.setEnd(elem, i++);
        } catch (err) {
            break;
        }
    }
    var selection = window.getSelection();
    selection.removeAllRanges();
    selection.addRange(range);
}