本文共 1275 字，大约阅读时间需要 4 分钟。

/** * 复制代码，支持IE/Firefox/NS */function copyToClipboard(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("你使用的FireFox浏览器,复制功能被浏览器拒绝！\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”双击，设置为“true”");			return;		}		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);	}}

转载地址：http://rrbhb.baihongyu.com/