Nokia 6210 Developer's Manual

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Nokia 6210 Developer's Manual Manual pdf 28 page image

28 (29)5.3.4 Choose Descriptive Card TitlesIt is very useful to give a descriptive name to the card. It might be a good idea to start the title withyour service’s name and keep the total length of the title short.It also pays to use meaningful URLs since the user sees the URL of the currently selected link on thescreen and can use it as a navigational aid, especially when images have not been loaded.5.3.5 Pay Attention to the First ScreenThe first (topmost) screen of any page is the most important one. All of the often-used navigationallinks, search fields, login screens, and the bulk of the information should reside there if at all possible.The user is then able to navigate forward before the rest of the card has been loaded, and the userdoes not have to scroll through the card.Avoid wasting the top of the page on banner advertisements or non-informative graphics. It is betterto place the advertisements at the left or right edges than on the top.5.3.6 Do not Use Absolute Values for the Screen SizeWhen using images the use of absolute values (in pixels) is not recommended. Sizes should be specifiedas percentages of their total width or height.5.3.7 DO-elements UsageAlways use descriptive and short labels for all DO-elements. Favour local DO-elements instead ofanchored links that are out of context. Global DO-elements should be used only when especiallyneeded at the end of the card. Always include the prev element in every card to enable backwardnavigation.5.4 Pictures, Tables and Colour5.4.1 Avoid Useless ImagesDownloading of images takes time, and many users may switch the loading of images off for morespeed. Try to optimize the size of the images. If you have large pictures on your site, consider usingthumbnails for the image index.Always give an alternative text (using the ALT attribute of the IMG element) for images that conveyinformation. Always use a null alternative text (ALT=””) for images which do not convey information, orare used for page layout or decorative purposes only.5.4.2 Use Reasonable Tables SizesIf the table size exceeds the maximum width of the application screen due to the number of columnsthe table size will be scaled down to fit the screen. To keep the cell content readable, special attentionshould be paid to the table structuring.5.5 Take care of backward navigationDue to the differences in the processing of the History between WAP and WEB, only the historyprocessing described in the WML specifications is followed. This means that the service provider has totake care of the navigation as a whole!

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