JS 图片大小自动调整 (img)

<script>

function dlutChangeImg(){

var maxwidth = 598;

var obj = document.getElementById('bbs_font_size');

var imgs = obj.getElementsByTagName('img');

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

var img = imgs[i];

var width = img.width;

var height = img.height;

if(width > maxwidth){

var p = width/height

img.width = maxwidth;

img.height = parseInt(maxwidth/p);

img.style.width = maxwidth + "px";

img.style.height = parseInt(maxwidth/p) + "px";

}

}

}

window.onload = function(){   dlutChangeImg(); } </script>