function visible(id, mode){
	if(mode == '1'){
		document.getElementById(id).style.display = 'block';
		document.getElementById('overlay_' + id).style.display = 'block';
		if(document.getElementById('overlay_' + id).style.visibility == null){
			document.getElementById('overlay_' + id).visibility = 'visible';
			document.getElementById(id).visibility = 'visible';	
		}

	} else {
		document.getElementById('overlay_' + id).style.display = 'none';
		document.getElementById(id).style.display = 'none';
		if(document.getElementById('overlay_' + id).style.visibility == null){
			document.getElementById('overlay_' + id).visibility = 'none';
			document.getElementById(id).style.visibility = 'none';	
		}
	}
}