Javascript动态创建复选框

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>动态创建复选框</title>
        
        <script type="text/javascript">
            
            //动态创建复选框
        function create_checkbox(){
        //获得div
  &nb