function popup(message) {
	var maskHeight = $(document).height();  
	var maskWidth = $(window).width();
	
	var dialogTop =  (maskHeight/3) - ($('#dialog-box').height());  
	var dialogLeft = (maskWidth/2) - ($('#dialog-box').width()/2); 
	
	$('#dialog-overlay').css({height:maskHeight, width:maskWidth}).show();
	$('#dialog-box').css({top:dialogTop, left:dialogLeft}).show();
	
	$('#dialog-message').html(message);			
}
function hide(){
	document.getElementById('dialog-overlay').style.display = 'none';
	document.getElementById('dialog-box').style.display = 'none';
}