var originimage=new image();
function getimagewidth(oimage)
{
if(originimage.src!=oimage.src)originimage.src=oimage.src;
return originimage.width;
}
function getimageheight(oimage)
{
if(originimage.src!=oimage.src)originimage.src=oimage.src;
return originimage.height;
}
[ctrl+a 全选 注:如需引入外部js需刷新才能执行]