【css_attribute】
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
src='http://code.jquery.com/jquery-1.9.1.js'></script>
<script type='text/javascript'>
$(window).load(function(){
$(function() {
console.log($(".testclass").css("margin-top"));
console.log(parseInt($(".testclass").css("margin-top")));
});
});
</script>
</head>
<body>
<div class="testclass"
style="margin-top: 30px; width: 200px; height: 200px; border: 1px solid #000;"></div>
</body>
</html>
