<div id=article>  图 </div>

<script type="text/javascript" >

//缩放图片到合适大小

function ResizeImages()

{

var myimg,oldwidth,oldheight;

var maxwidth=400;

var maxheight=555;

var imgs = document.getElementById('article').getElementsByTagName('img'); //如果你定义的id不是article，请修改此处

for(i=0;i<imgs.length;i++){

myimg = imgs[i];

if(myimg.width > myimg.height)

{

if(myimg.width > maxwidth)

{

oldwidth = myimg.width;

myimg.height = myimg.height * (maxwidth/oldwidth);

myimg.width = maxwidth;

}

}else{

if(myimg.height > maxheight)

{

oldheight = myimg.height;

myimg.width = myimg.width * (maxheight/oldheight);

myimg.height = maxheight;

}

}

}

}

//缩放图片到合适大小

ResizeImages();

</script>