javascript复制到粘贴板，支持各种浏览器

　　点击复制到粘贴板的代码，支持各种浏览器，我只试过了IE,FF，不过在FF下会提示一段信息让你接受 script type=text/javascript function copyToClipboard(txt) { if(window.clipboardData) { window.clipboardData.clearData(); window.clipboardData.setData

<script type="text/javascript">
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;  
       } else if (window.netscape) {  
            try {  
                 netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");  
            } catch (e) {  
                 alert("如果您正在使用FireFox！\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！")  
       }  
}
</script>