在使用()%＞时遇到的错误

正确代码：
window.location.href = “<%=request.getContextPath()%>/dept/delete?deptno=” dno;
或
window.location.href = “<%=request.getContextPath()%>” “/dept/delete?deptno=” dno;

错误代码：
window.location.href = <%=request.getContextPath()%> “/dept/delete?deptno=” dno;