function showLoadingLayer( str_message )
{
	document.getElementById('loadinglayer').style.visibility = 'visible';
	document.getElementById('loadinglayer').style.display = 'block';
	if ( str_message != '' )
	{
		document.getElementById('loadinglayer').innerHTML = '<img src="/images/buttons/ajax-loader.gif" /><br />' + str_message;	
	}
}