jQuery.easing.easeOutQuint = function(x,t,b,c,d){
	return c*((t=t/d-1)*t*t*t*t + 1) + b;
};

$(function(){
	$("#pagetop").click(function(){
		$((navigator.userAgent.indexOf("Opera") != -1) ? document.compatMode == 'BackCompat' ? 'body' : 'html' :'html,body').animate({scrollTop:0}, 'slow', 'easeOutQuint');
	})
})