freemaker的函数使用

如下：
<html>

   <body>

      <div class="container">

      <h4>修改用户角色</h4>

<#function contain userList roleTypeId>

	<#local num=0>

	<#list userList as userList>

		<#if userList.roleTypeId ==roleTypeId>

			<#local num = num +1 >

		</#if>

	</#list>

	<#return num>

</#function>

    <form role="form" method="post" action="/userManage/userRoleSave" enctype="multipart/form-data">

        <label class="label-tips" for="u">账号:</label>

        <span id="username">${(userinfo.username)!''}</span><p>

        <label class="label-tips" for="nickname">昵称:</label>

        <span id="nickname">${(userinfo.nickname)!''}</span><p>

        <label class="label-tips" for="roles">已有角色:</label><p>

        <#list userinfo.roles as userRoleList>

        <tr>

        	<td>

        		<span id="roleName">${(userRoleList.roleTypeId)!''}.${(userRoleList.roleName)!''}&nbsp&nbsp&nbsp&nbsp</span>

        	</td>

        </tr>

        </#list><p>

		<label class="label-tips" for="u">修改角色: </label><p>

        <#list roles as rolesList>

        	<input type="checkbox" name="roleTypeIdList" id="sexMAN" value="${(rolesList.roleTypeId)!''}"  <#if contain(userinfo.roles,rolesList.roleTypeId)==1 > checked="checked" </#if>>${(rolesList.roleTypeId)!''}.${(rolesList.roleName)!''}&nbsp&nbsp&nbsp&nbsp

  	</#list>

        	<input hidden type="text" name="userid" value="${(userinfo.userid)!''}"><p>

        　　　　　<input type="submit" name="修改"/>${(msg?if_exists)!''}

    </form>

</div>

</body>

</html>