function open_window(URL, w, h)
	{
	    var nw = window.open(URL,'T4T','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbar=yes,resizeable=no,height=' + h + ',width=' + w);
	}
	
function set_footer()
{
	//var cont_h	=	$('content').getStyle('height').toInt();
	var cont_h	=	document.getElementById('content').offsetHeight;
	//alert(cont_h);
	if(cont_h > 400)
	{
		$('footer').setStyle('position', 'relative');
		//$('butterflies').setStyle('position', 'relative');
		//$('butterflies').setStyle('height', '20px');
	}
}