팝업창을 마우스로 이동 가능하게 하는 방법

var x_styleLeft, y_styleTop, x_accept, y_accept;



$(document).ready(function(){ 
$('#pop-up').mousedown(function(event) {
		x_styleLeft = event.clientX - $("#pop-up").offset().left;
		y_styleTop = event.clientY - $("#pop-up").offset().top;
		$(document).mousemove(function(event){ 
		x_accept = event.clientX - x_styleLeft;
		y_accept = event.clientY - y_styleTop;
		$("#pop-up").css("left",x_accept+"px"); 
		$("#pop-up").css("top",y_accept+"px"); 
		});
	});
}).mouseup(function(){
	$(this).off('mousemove');
});



$('#pop-up').css('cursor', 'move')