function avaaPopUp() {
  document.body.style.overflow = "hidden"; 
	document.getElementById('popup').style.visibility = "visible";
}

function suljePopUp() {
  document.body.style.overflow = "auto"; 
 	document.getElementById('popup').style.visibility = "hidden";
}
/*
document.write('<div id="popup"><img src="popup.jpg" width="900" height="650" onClick="suljePopUp();"></div>');
document.write('<script type="text/javascript">');');
document.write('var flash = new SWFObject("skaala_banner_uk.swf", "bannerpopup", "800", "500", "8", "");');
document.write('flash.addParam("wmode","transparent");');
document.write('flash.write("popup");');
document.write('</script>');
*/