setInterval and Behaviors

Hi,

I am currently writing a behavior and wish to use setInterval but it keeps
causing the script to stop working.  Can setInterval be used within a
behavior and, if so, how?

I have the following:

<PUBLIC:METHOD NAME="LowerMenu" />
<script>
function LowerMenu(){
	style.display = "block"
	down = setInterval("lower()",2)
}

function lower(){
	style.pixelTop = offsetTop += 30
	if(offsetTop >= 400){
		style.pixelTop = 400
		clearInterval(down)
	}
}
</script>

When LowerMenu() is called externally from another behavior routine, it
freezes.

Hope you can help.

Cheers,

Keith

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