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);

}

}