code: function() {
    	     var strength = inputEx.PasswordField.getPasswordStrength(this.getValue());
          for(var i = 0 ; i < 4 ; i++) {
             var on = (strength >= i*25) && (strength>0);
             YAHOO.util.Dom.setStyle(this.strengthBlocks[i],"background-color", on ? "#4AE817" : "#FFFFFF");
  		  }
       }
docs: Update the strength indicator (called by onKeyPress)