<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script type="text/javascript" src="js/jquery.js" ></script>
<title></title>
</head>
<body>
<span id="activity" th:text="${details.graprice}"></span>
<span id="he" class="a">2</span>
<script type="text/javascript">
var a=document.getElementById("activity").innerHTML;
var b=document.getElementById("he").innerHTML;
alert(a+b);
</script>
</body>
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