点击提交按钮执行func()，但是报错：意外地调用了方法或属性访问，请问这是怎么回事？

function func() {
    
    // 确定当前文档的执行环境
    var OBJ = window.parent.frames[0].OBJ;
    
    // 启动客户端请求
    var request = getHttpRequest();
    
    // 数据打包
    var mydata = new Array();
    mydata.push( 'createtype' + '=' + encodeURIComponent(OBJ.MyType) );
    mydata.push( 'title' + '=' + encodeURIComponent(OBJ.MyWYSIWYG.T) );
    mydata.push( 'url' + '=' + encodeURIComponent(OBJ.MyWYSIWYG.U) );
    mydata.push( 'type' + '=' + encodeURIComponent(OBJ.MyCategory) );
    mydata.push( 'name' + '=' + encodeURIComponent(OBJ.MyWords.Word.join(',')) );
    var mydatastr = mydata.join('&');
    if ( request ) {
        request.onreadystatechange = function() {
            if ( request.readyState == 4 ) {
                if ( request.status == 200 ) {
                    // do sth. ...
                }
            } else {
                document.getElementById('button_prevstep').disabled = true;
                document.getElementById('button_submit').disabled = true;
            }
        }
    }
    request.open('POST', 'create_myapp.php', true);
    request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;");
    request.send(mydatastr);
}
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FROM 218.249.75.*

不为空。是object

【 在 sly9 (弱) 的大作中提到: 】
: 你确定你的OBJ取的正常么
: 你在OBJ = window.parent.frames[0].OBJ;之后加一个alert(OBJ);看看是啥
: 我觉得是空。。
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FROM 218.249.75.*