Answers for "give height on textarea"

html textarea height

<!-- textarea rows attribute -->
<textarea id="txtid" name="txtname" rows="4" cols="50" maxlength="200">
A nice day is a nice day.
Lao Tseu
</textarea>

get height of text in textarea

ele.scrollHeight (Height of text inside scroll inlduing what u cant see)
ele.clientHeight (What u see)