image in a div

[NZ_Kiwis]

I have a div with rounded corners, inside this I want to display a PHP GD image which will be updated via AJAX. For this reason I don't want to set the background property within CSS.

How can I have the rounded corners of the DIV override the square image corners?

<div stlye="border-radius: 13px;">
<img src="myimage.php">
</div>

[Weedpacket]

JavaScript is capable of changing CSS properties of elements, including the background.