var maxWidth = 450; function scaleImage(im) { if (typeof im.naturalWidth == 'undefined') im.naturalWidth = im.width; if (im.naturalWidth > maxWidth) { im.width = maxWidth; im.style.maxWidth = im.naturalWidth + 'px'; im.className = 'resized'; im.title = '点击放大图片（原图尺寸）|Click to see the original size'; im.onclick = unscaleImage;}
}
function unscaleImage() { if (this.width == maxWidth) { this.width = this.naturalWidth; this.style.borderWidth = '0px'; this.title = '点击缩小图片|Click to change image size back';} else { this.width = maxWidth; this.style.border = '2px dotted #ff0000'; this.title = '点击缩小图片|Click to see original size';}
}