Initialize a datepicker on a text field

//  http://www.gravityhelp.com/forums/topic/date-picker-validation-in-datefield#post-149929
jQuery(document).bind('gform_post_render', function(){
        // create new custom datepicker
        // change input_3_4 to your text field where you want a custom formatted datepicker
        jQuery("#input_3_4").datepicker({
                defaultDate: '+7d',
                autoSize: true,
                minDate: '+7d',
                dateFormat: 'DD, d MM, yy',
                gotoCurrent: true,
                prevText: '',
                showOn: 'both',
                buttonImage: '',
                buttonText: '',
                buttonImageOnly: true
        });
});