//显示层
function jaxa_msg(){
	var popupHeight = $("#jaxa_msg").height();
	var popupWidth = $("#jaxa_msg").width();
	
	var doc = window.document;
	var sl = Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft);
	var st = Math.max(doc.documentElement.scrollTop, doc.body.scrollTop); //考虑滚动的情况
	//centering
	$("#jaxa_msg").css({
		"top": $(window).height()/2-popupHeight/2 + st + "px",
		"left": $(window).width()/2-popupWidth/2 + sl + "px"
	});
	$("#jaxa_msg").fadeIn("slow");
	setTimeout(function(){
					$("#jaxa_msg").fadeOut("slow");
				}
				,3000
			   );
}

function jaxa_load_msg(msg){
	$("#jaxa_msg").html(msg);
	var popupHeight = $("#jaxa_msg").height();
	var popupWidth = $("#jaxa_msg").width();
	
	var doc = window.document;
	var sl = Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft);
	var st = Math.max(doc.documentElement.scrollTop, doc.body.scrollTop); //考虑滚动的情况
	//centering
	$("#jaxa_msg").css({
		"top": $(window).height()/2-popupHeight/2 + st + "px",
		"left": $(window).width()/2-popupWidth/2 + sl + "px"
	});
	$("#jaxa_msg").fadeIn("slow");
}