if(Ext.util.Format){
   Ext.util.Format.date = function(v, format){
      if(!v) return "";
      if(!(v instanceof Date)) v = new Date(Date.parse(v));
      return v.dateFormat(format || "d/m/Y");
   };
}

if(Ext.DatePicker){
   Ext.apply(Ext.DatePicker.prototype, {
      todayText         : "Today",
      minText           : "This date is before the minimum date",
      maxText           : "This date is after the maximum date",
      disabledDaysText  : "",
      disabledDatesText : "",
      monthNames	: Date.monthNames,
      dayNames		: Date.dayNames,
      nextText          : 'Next Month (Control+Right)',
      prevText          : 'Previous Month (Control+Left)',
      monthYearText     : 'Choose a month (Control+Up/Down to move years)',
      todayTip          : "{0} (Spacebar)",
      format            : "d/m/y"
   });
}
if(Ext.form.DateField){
   Ext.apply(Ext.form.DateField.prototype, {
      disabledDaysText  : "Disabled",
      disabledDatesText : "Disabled",
      minText           : "The date in this field must be after {0}",
      maxText           : "The date in this field must be before {0}",
      invalidText       : "{0} is not a valid date - it must be in the format {1}",
      format            : "d/m/y",
      altFormats        : "d/m/Y|d-m-y|d-m-Y|d/m|d-m|dm|dmy|dmY|d|Y-m-d"
   });
}