페이지 를 떠 날 때 자료 수정 여 부 를 검증 하고 수정 이 있 으 면 팝 업 알림 확인 상자

//                ，            
(function () {
    var E = YAHOO.util.Event;
    var D = YAHOO.util.Dom;
    var oldContent = '';
    var newContent = '';
    var contentReady = false;
    var form = (D.getElementsByClassName("infoForm"))[0];

    var getOldContent = function () {
        oldContent = '';
        for (var i = 0; i < form.length; i++) {
            if (form.elements[i].type == 'hidden')
                continue;
            //                
            if (form.elements[i].value == "            ")
                continue;
            if (form.elements[i].type == 'radio') {
                oldContent += form.elements[i].checked;
                continue;
            }
            if (form.elements[i].type == 'checkbox') {
                oldContent += form.elements[i].checked;
                continue;
            }
            oldContent += form.elements[i].value;
        }
        contentReady = true;
    }

    var checkEdit = function (e) {
        var newContent = '';
        for (var i = 0; i < form.length; i++) {
            if (form.elements[i].type == 'hidden')
                continue;
            if (form.elements[i].value == "            ")
                continue;
            if (form.elements[i].type == 'radio') {
                newContent += form.elements[i].checked;
                continue;
            }
            if (form.elements[i].type == 'checkbox') {
                newContent += form.elements[i].checked;
                continue;
            }
            newContent += form.elements[i].value;

        }
        if (newContent != oldContent)
            e.returnValue = '======================================
' + '           ，      ？
' + '======================================';
    }

    E.onDOMReady(function () {
        setTimeout(getOldContent, 1000);
    });

    E.addListener(window, 'beforeunload', function (e) {
        if (contentReady == true)
            checkEdit(e);
    });

    form.onsubmit = function () {
        getOldContent();
    };
})();