js 复制内容到剪贴板（兼容IE,Firefox）

 function copyToClipboard(txt) { txt = "http://" + window.location.host + '<%=Url.Action("DownLoad","File")%>' + "?fid=" + txt; ; if (window.clipboardData) { window.clipboardData.clearData(); window.clipboardData.setData("Text", txt); alert("复制成功！"); } else if (navigator.userAgent.indexOf("Opera") != -1) { window.location = txt; alert("复制成功！"); } else if (window.netscape) { try { netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); } catch (e) { alert("被浏览器拒绝！/n请在浏览器地址栏输入'about:config'并回车/n然后将'signed.applets.codebase_principal_support'设置为'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); alert("复制成功！") } }