I am trying to define a border around a div tag in HTML. In some browsers the border does not appear. Here is my HTML code:

<div id="divActivites" name="divActivites" style="border:thin">
    <textarea id="inActivities" name="inActivities" style="border:solid">
    </textarea> 
</div>

How do I set a border for an HTML div tag?

html css border
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