Firefox中透過Javascript 存取剪貼簿function

//Copy to clipboard: ref http://forum.moztw.org/viewtopic.php?p=131407

function copyToClipboard(txt) {
var copied = false;
if(window.clipboardData) {
window.clipboardData.clearData();
window.clipboardData.setData("Text", txt);
copied = true;
} else if (window.netscape) {
try {
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
} catch (e) {
alert("被瀏覽器拒絕！\n請在瀏覽器網址列輸入'about:config'\n，將'signed.applets.codebase_principal_support'設為'true'");
}
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);
copied = true;
}
if (copied) alert('文字內容已複製到剪貼簿中!');
else alert("使用的瀏覽器不支援文字複製功能!");
}
參考：黑暗執行緒