JS: Set selection and cursor position in input

function setInputSelection(input, startPos, endPos) {
    if (input.setSelectionRange) {
        input.focus();
        input.setSelectionRange(startPos, endPos);
    } else if (input.createTextRange) {
        var range = input.createTextRange();
        range.collapse(true);
        range.moveEnd('character', endPos);
        range.moveStart('character', startPos);
        range.select();
    }
}

function setInputPos(input, pos) {
    setInputSelection(input, pos, pos);
}