jQuery(function(){
var i = 0;
jQuery('#pingNtb').click(function()
{
i++;
jQuery('#commentlist4tb').toggle();
if(i%2 != 0)
this.innerHTML = "hide";
else
this.innerHTML = "show";
});

var d=new Date();
var currentHour = d.getHours();
var main_image = jQuery('#background');
var background = jQuery('#header');
if(currentHour >= 11 && currentHour < 16){
	main_image.toggleClass('background-morning');
	background.toggleClass('header');
}else if(currentHour >= 16 && currentHour < 19){
	main_image.toggleClass('background-evening');
	background.toggleClass('header-evening');
}else if(currentHour >= 19 && currentHour < 24){
	main_image.toggleClass('background-night');
	background.toggleClass('header-night');
}else if(currentHour >= 0 && currentHour < 7){
	main_image.toggleClass('background-dawn');
	background.toggleClass('header-dawn');
}else if(currentHour >= 7 && currentHour < 11){
	main_image.toggleClass('background');
	background.toggleClass('header');
}
main_image.css('visibility', 'visible');
background.css('visibility', 'visible');
});