剪贴板操作

function getClipboard() {
    if (window.clipboardData) {
        return window.clipboardData.getData("text");
    } else {
        if (window.netscape) {
            try {
                netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
                var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
                if (!clip) {
                    return;
                }
                var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
                if (!trans) {
                    return;
                }
                trans.addDataFlavor("text/unicode");
                clip.getData(trans, clip.kGlobalClipboard);
                var str = new Object;
                var len = new Object;
                trans.getTransferData("text/unicode", str, len);
            } catch (e) {
                alert("\u60A8\u7684firefox\u5B89\u5168\u9650\u5236\u9650\u5236\u60A8\u8FDB\u884C\u526A\u8D34\u677F\u64CD\u4F5C\uFF0C\u8BF7\u6253\u5F00'about:config'\u5C06signed.applets.codebase_principal_support'\u8BBE\u7F6E\u4E3Atrue'\u4E4B\u540E\u91CD\u8BD5\uFF0C\u76F8\u5BF9\u8DEF\u5F84\u4E3Afirefox\u6839\u76EE\u5F55/greprefs/all.js");
                return null;
            }
            if (str) {
                if (Components.interfaces.nsISupportsWString) {
                    str = str.value.QueryInterface(Components.interfaces.nsISupportsWString);
                } else {
                    if (Components.interfaces.nsISupportsString) {
                        str = str.value.QueryInterface(Components.interfaces.nsISupportsString);
                    } else {
                        str = null;
                    }
                }
            }
            if (str) {
                return str.data.substring(0, len.value / 2);
            }
        }
    }
    return null;
}

var copy2Clipboard = function (txt) {
    if (window.clipboardData) {
        window.clipboardData.clearData();
        window.clipboardData.setData("Text", txt);
    } else if (navigator.userAgent.indexOf("Opera") != -1) {
        window.location = txt;
    } else if (window.netscape) {
        try {
            netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
        } catch (e) {
            alert("\u60A8\u7684firefox\u5B89\u5168\u9650\u5236\u9650\u5236\u60A8\u8FDB\u884C\u526A\u8D34\u677F\u64CD\u4F5C\uFF0C\u8BF7\u6253\u5F00\u2019about:config\u2019\u5C06signed.applets.codebase_principal_support\u2019\u8BBE\u7F6E\u4E3Atrue\u2019\u4E4B\u540E\u91CD\u8BD5\uFF0C\u76F8\u5BF9\u8DEF\u5F84\u4E3Afirefox\u6839\u76EE\u5F55/greprefs/all.js");
            return false;
        }
        var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
        if (!clip) {
            return;
        }
        var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
        if (!trans) {
            return;
        }
        trans.addDataFlavor("text/unicode");
        var str = new Object;
        var len = new Object;
        var str = Components.classes['@mozilla.org/supports-string;1'].createInstance(Components.interfaces.nsISupportsString);
        var copytext = txt;
        str.data = copytext;
        trans.setTransferData("text/unicode", str, copytext.length * 2);
        var clipid = Components.interfaces.nsIClipboard;
        if (!clip) {
            return false;
        }
        clip.setData(trans, null, clipid.kGlobalClipboard);
    }
}

document.body.oncopy = function () {
 setTimeout( function () {
  var text = getClipboard();
  if (text) {
   text = text + "\r\n详细出处参考："+document.location.href;
copy2Clipboard(text);

  }
    }, 100 )
}