JS旋钮复制文本框内容

JS按钮复制文本框内容

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<input type="text" value="www.xxx.com?xxx=xxx" size="50" id='registerUrl'/>                                <input type="button" value="复制" onclick="javascript:setCopy($('#registerUrl').val())"/>

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<script>            function setCopy(_sTxt){                try{                    if(window.clipboardData) {                        window.clipboardData.setData("Text", _sTxt);                    } else if(window.netscape) {                        netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');                        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 = _sTxt;                        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);                    }                }catch(e){}            }         </script>