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);
}elseif(navigator.userAgent.indexOf(”Opera”)!=-1){
window.location=txt;
}elseif(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”);
returnfalse;
}
varclip=Components.classes['@mozilla.org/widget/clipboard;1′].createInstance(Components.interfaces.nsIClipboard);
if(!clip)
return;
vartrans=Components.classes['@mozilla.org/widget/transferable;1′].createInstance(Components.interfaces.nsITransferable);
if(!trans)
return;
trans.addDataFlavor('text/unicode');
varstr=newObject();
varlen=newObject();
varstr=Components.classes[”@mozilla.org/supports-string;1″].createInstance(Components.interfaces.nsISupportsString);
varcopytext=txt;
str.data=copytext;
trans.setTransferData(”text/unicode”,str,copytext.length*2);
varclipid=Components.interfaces.nsIClipboard;
if(!clip)
returnfalse;
clip.setData(trans,null,clipid.kGlobalClipboard);
}
}