@{
    var message="";
    var sql="";
    var db = Database.Open("Classifieds");
    
    if(!Request["categoryId"].IsEmpty()){
        sql="DELETE FROM Categories WHERE CategoryId IN ({0})";
        try{
            db.ExecuteIn(sql, Request["categoryId"]);
            message="Categories Deleted. Delete more?";
        }
        catch(Exception ex){
            message="One or more Categories could not be deleted. Other references exist";
        }
    }
    sql="SELECT * FROM Categories";
    var categories =db.Query(sql);
}
<script type ="text/javascript">
    $(function(){
        $('#delete').click(function(){
            return confirm('Are you sure you want to delete?');
        });
    });
</script>
<form method="post">
    <fieldset>
        <legend>Delete Categories</legend>
        <div>@message</div>
        <div>
            Select Categories to delete:
            <div>
                @foreach(var cat in categories){
                    <input type="checkbox" name="categoryId" value="@cat.CategoryId" />@cat.Category<br />
                }
            </div>
            <input type="submit" id="delete" value="Delete" />
        </div>
    </fieldset>
</form>