JS 点击复制剪切板内容(IE8、IE9、Firefox4测试支持)

function copyToClipboard(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("被浏览器拒绝！\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")  
    }  
}  

<textarea id="inputTest" name="inputTest" rows="4" cols="130"  onclick="copyToClipboard($('#inputTest').val())">{my:$url}</textarea>