function setImg (img, path) {
	if (img != null) {
		if (img.src != path)
			img.src = path;
			fixPNG(img);
	}
}

function setBottom() {
	var frameH = document.compatMode=='CSS1Compat' && !window.opera?document.documentElement.clientHeight:document.body.clientHeight;
	if (document.getElementById('main_container'))
		document.getElementById('main_container').style.height = (frameH > 890 ) ? (frameH + 'px') : (890 + 'px');
	else if (document.getElementById('main_container_in')) {
		var contentH = document.getElementById('content').offsetHeight + document.getElementById('footer').offsetHeight;
		document.getElementById('main_container_in').style.height = (frameH > contentH ) ? (frameH + 'px') : (contentH + 'px');
	}
}

function showLayer (id) {
  if (document.getElementById(id).style.visibility == 'visible') {
    document.getElementById(id).style.visibility = 'hidden';
  }    
  else {
    document.getElementById(id).style.visibility = 'visible';
  } 
}