well as include defaultcontrolwidth and defaultcontrolheight the former specify the default width and height of the images after they have been compressed for transmission the latter specify the default width and height of all media object identifiers to create media object identifiers having different sizes the customer specifies the desired size when creating the media object identifier another fixed value for all submissions is quality this determines the quality level of the images after they have been compressed for transmission 0 is the lowest quality highest compression and 100 is the highest quality lowest compression fixed values for all media objects within a submission include key 1 and key 2 key 1 is the primary value that determines the filename of the resulting image file and consequently its url it is important that each submitted image have a unique name to prevent one image from overwriting another key 2 is an optional secondary key that is appended to key 1 before the image 39 s filename and url are created while default values for key 1 and key 2 can be specified in the configuration section more likely this value will be supplied from a field in the web form if the web page form contains a control named u201c key1 u201d then its value will be used for this key for example the field key 1 might be labeled as u201c mls number u201d on the web page similarly the field key 2 might be labeled u201c zip code u201d on the web page a sequence number is appended to the key 1 key 2 combination when there are multiple media object identifiers on a page this will ensure that each image has a unique key all media object.