微信小图消息数

#wechat {
	display:inline-block;
	position:relative;
}
#pic {
	width:200px;
	height:200px;
}
#mesgNum {
	width:30px;
	height:30px;
	line-height:30px;
	font:16px;
	font-weight:bold;
	color:#fff;
	text-align:center;
	border-radius:50%;
	background-color:#f00;
	position:absolute;
	right:0px;
	top:-10px;
}

$(function() {
    $("#pic").click(function() {
        var strnum = $("#mesgNum").text();
        if (strnum == "") {
            $("#mesgNum").text('1');
        } else {
            var num = parseInt(strnum)
            num = num + 1;
            $("#mesgNum").text(num);
        }
    });
});