细枝末节

SCRIPT：

var img = $('<img/>');

img.load(function() {
var height = $("#div_img img").height();
alert(height);
});
$("#div_img").empty();
$("#div_img").append(img);

img.attr("src", image_url);

HTML：

<div id="div_img" style="visibility: hidden; overflow: hidden; width: 0px; height: 0px;"></div>

1、jQuery，load函数

2、style="visibility: hidden; overflow: hidden; width: 0px; height: 0px;"

为何不用：display: none;