点击复制如何写？在线等~~~~~~~~

Question

     <ul class="list">
     <li><span>ADF46366SFF5665</span><span><input type="button" value="复制卡号" class="buy_smbtn_b_s" /></span></li>
     <li><span>51463444685665</span><span> <input type="button" value="复制密码" class="buy_smbtn_b_s" /></span></li>
     </ul>
     <ul class="list">
     <li><span>ADF46366SFF5665</span><span><input type="button" value="复制卡号" class="buy_smbtn_b_s" /></span></li>
     <li><span>51463444685665</span><span> <input type="button" value="复制密码" class="buy_smbtn_b_s" /></span></li>
     </ul>
     <ul class="list">
     <li><span>ADF46366SFF5665</span><span><input type="button" value="复制卡号" class="buy_smbtn_b_s" /></span></li>
     <li><span>51463444685665</span><span> <input type="button" value="复制密码" class="buy_smbtn_b_s" /></span></li>
     </ul>
以上HTML中，UL标签是循环多组的，怎么能完成点击复制卡号就赋值对应span的值，点击复制密码也同理，在线等~~~~~~~~~~~着急~~~~~~

Answer 1

http://blog.csdn.net/hudiezhanshi/archive/2009/01/21/3846972.aspx

Answer 2

    <ul class="list">
        <li><span>ADF46366SFF5665</span><span><input type="button" value="复制卡号" class="buy_smbtn_b_s" onclick="copy(this)" /></span></li>
        <li><span>51463444685665</span><span>
            <input type="button" value="复制密码" class="buy_smbtn_b_s" onclick="copy(this)" /></span></li>
    </ul>
    <ul class="list">
        <li><span>ADF46366SFF5665</span><span><input type="button" value="复制卡号" class="buy_smbtn_b_s" onclick="copy(this)" /></span></li>
        <li><span>51463444685665</span><span>
            <input type="button" value="复制密码" class="buy_smbtn_b_s" onclick="copy(this)" /></span></li>
    </ul>
    <ul class="list">
        <li><span>ADF46366SFF5665</span><span><input type="button" value="复制卡号" class="buy_smbtn_b_s" onclick="copy(this)" /></span></li>
        <li><span>51463444685665</span><span>
            <input type="button" value="复制密码" class="buy_smbtn_b_s" onclick="copy(this)" /></span></li>
    </ul>
    <script type="text/javascript">
    var copy = function(o)
    {
       var txt = o.parentNode.previousSibling.innerHTML
       copyToClipboard(txt);
    }
    
var copyToClipboard = function(txt) { 
    if(window.clipboardData) 
    { 
        window.clipboardData.clearData();   
        window.clipboardData.setData("Text",txt);    
        alert("网址复制成功!快用Ctrl+V粘贴到QQ，MSN中发送给好友吧！")    
    } 
    else if(navigator.userAgent.indexOf("Opera") != -1) 
    {    
        window.location = txt;  
        alert("网址复制成功!快用Ctrl+V粘贴到QQ，MSN中发送给好友吧！")    
    } 
    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("网址复制成功!快用Ctrl+V粘贴到QQ，MSN中发送给好友吧！")    
    }   
}    
    </script>