缩放代码：

复制代码 代码如下:

缩放代码：

<script type="text/javascript">

//图片按比例缩放

var flag = false;

function DrawImage(ImgD, iwidth, iheight) {

//参数(图片,允许的宽度,允许的高度)

var image = new Image();

image.src = ImgD.src;

if (image.width > 0 && image.height > 0) {

flag = true;

if (image.width / image.height >= iwidth / iheight) {

if (image.width > iwidth) {

ImgD.width = iwidth;

ImgD.height = (image.height * iwidth) / image.width;

} else {

ImgD.width = image.width;

ImgD.height = image.height;

}

ImgD.alt = image.width + "×" + image.height;

}

else {

if (image.height > iheight) {

ImgD.height = iheight;

ImgD.width = (image.width * iheight) / image.height;

} else {

ImgD.width = image.width;

ImgD.height = image.height;

}

ImgD.alt = image.width + "×" + image.height;

}

}

}

</script>

页面代码：

<img onload="javascript:DrawImage(this,89,63)" src="http://www.jb51.net/images/logo.gif" width="89" height="63" border="0" />

觉得不错的发个言！

页面代码：

1. <img onload="javascript:DrawImage(this,89,63)" src="http://www.baidu.com/img/baidu_logo.gif" width="89" height="63" border="0" />

觉得不错的发个言！