range.select() is not working on Chrome, what could be the equivalent code for following snippet in Chrome?

The application works fine on IE.

InputHelper.prototype.setValue = function (field, input, mode)
{
    if (field == null) return null;

    var range = null;

    console.log(mode);
    if (mode >= 1) range = field.setSelectionRange (0, field.length);
    if (mode == 0) range = document.createRange()


    if (range == null) return null;
    if (input == null) return null;

    range.text = String (input);
    console.log(range);

>   range.select ();

    return field.value;
}

Equivalent snippet for newer browsers.