代码如下，就不多说废话了，可以兼容基本上所有的主流浏览器(IE,FF)，很多地方可以用到的：
copyToClipboard = 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(”您的firefox安全限制限制您进行剪贴板操作，请打开'about:config'将signed.applets.codebase_principal_support'设置为true'之后重试”);
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);
}
}