document.observe("dom:loaded", function() {
	function contentFrameResize() {
		$('Main').style.height = document.viewport.getHeight() - 90 + "px";
	}
	//alert("l" + document.viewport.getHeight());
	contentFrameResize();
	Event.observe(document.onresize ? document : window, "resize", contentFrameResize );
});