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help with html rendering:how to programatically scroll textarea

I have talen help from BrowserField2Demo.java supplied with blackberry plugin for eclipse.

I have loaded my html with a textare inside it.I append text to this textarea continusously.When the text reaches the limit of the textare and i enter new text ,the textarea does not scroll down.The text keeps on getting appended without it being seen on screen.If i have to see the newly appende text i have to manually scroll the text area.

I want that the textarea should automatically scroll down as new text comes.

I have tried using this in the javascript function but it doesnt help.

 

textareaname.scrollTop = textareaname.scrollHeight