獲取原圖寬度，高度

自己手寫一個點擊頁面圖片放大的效果。遇到獲取原圖尺寸問題

var img = $("#img_id"); 
var pic_real_width, pic_real_height;
$("<img/>") 
    .attr("src", $(img).attr("src"))
    .load(function() {
        pic_real_width = this.width;   // Note: $(this).width() will not
        pic_real_height = this.height; // work for in memory images.
    });

轉載地址 http://www.webhek.com/post/get-real-image-width-and-height-with-javascript.html