【class】
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
src='http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js'></script>
<script type='text/javascript'>
$(window).load(function(){
$(document).ready(function() {
$("div.left_arrow_background").click(function(){
console.log('clicked!');
});
});
});
</script>
</head>
<body>
<div>
<div class='left_arrow_background'> LEFT</div>
</div>
</body>
</html>
