function repositionFooter() {
	var wrapperHeight = $("wrapper").getHeight();
	var footerHeight = $("footer").getHeight();
	var minWrapperHeight = document.viewport.getHeight() - footerHeight;

	if(wrapperHeight + footerHeight < document.viewport.getHeight()) {
		$("wrapper").setStyle({
			height: minWrapperHeight + "px"
		})
	}
}