if (img.naturalWidth) { // 现代浏览器 nWidth = img.naturalWidth nHeight = img.naturalHeight } else { // IE6/7/8 var imgae = new Image(); image.src = img.src; image.onload = function(){ nWidth = image.width; nHeight = image.height; } }获取图片宽、高
原文：http://my.oschina.net/u/232595/blog/469156
