【width】
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
src='http://code.jquery.com/jquery-2.0.2.js'></script>
<script type='text/javascript'>
$(window).load(function(){
var $img = $('.foo')
var $width = $img.width();
var $height = $img.height();
console.log($width );
console.log($height);
});
</script>
</head>
<body>
<div class='foo'>foo</div>
</body>
</html>
