(转)IE和firefox通用的复制到剪贴板的JS函数

function copyToClipboard(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！")}}

转自：http://www.iteye.com/topic/125198