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DHTML help

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Eclipse IDE Spring Java
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I want to create a control by use of DHTML/Javascript which should do a specific functionality. Should i use id for that control (suppose a button) and register that id with a particular event.

As we know with desktop application, each control is registered with some database field and get the updated value on fire of any type of event.I want same functionality by use of Javascript and html controls (textfield,select boxes, text areas, checkboxes).

Please suggest me somthing in such a case.
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I think you need to be more specific about what you need, giving at least one example.

By events, do you mean a user-initiated event (clicking on a button) or a system-initiated event (value in the database changing)? This former one is easy to do, the latter one is trickier - you can't register an HTML control with a server event. You'd just have to poll the server at regular intervals for changed data.

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