lib/Ext/field/Input.js
function() {
        var me = this,
            el = me.input;

        if (el && el.dom.focus) {
            el.dom.focus();
        }
        return me;
    }
function() {
        var me = this,
            el = me.input;

        if (el && el.dom.focus) {
            el.dom.focus();
        }
        return me;
    }
Attempts to set the field as the active input focus.
@return {Ext.field.Input} this