js 判断图片是否存在

function CheckImgExists(imgurl) {
    var ImgObj = new Image();
    ImgObj.src = imgurl;
    if (ImgObj.fileSize > 0 || (ImgObj.width > 0 && ImgObj.height > 0)) {
        return true;
    } else {
        return false;
    }
}

alert(CheckImgExists("http://123.56.187.157/hlts/res/images/jibenxinxzi.png"));