js中两个标签绑定一个事件

        <p>
            <label>描述:</label>
            <textarea cols="65" rows="10" onclick="Copy(this)" id="contents" readonly="readonly">{{task.description}}</textarea>
        </p>


        {% if task.content.code == "essay" %}
            <p>
                <label>子描述:</label>
                <textarea cols="65" rows="10" onclick="Copy(this)" readonly="readonly">{{task.original}}</textarea>
            </p>
            <style type="text/css">

.br{list-style:none;
    margin:130px 0 0 0 ;
    display: inline-block;
    background: #e3e3e3;
    border-radius:13px;
    border: 2px #D1E0F1 solid;
    width:130%;
    height: 170px;
}
.content{
    text-align:center;
    line-height:95px;
    font-size: 18px;
}
</style>
            <script type="text/JavaScript">
          function Copy(e){
       X    var e=document.getElementById("contents"); 同一个事件 id只能存在一个   

　　　　　　　var copy = e.getAttribute("copy");

　　　　　　　if(copy != "1"){ e.select(); document.execCommand("Copy"); e.setAttribute("copy", "1"); window.alert = function(str) { var shield = document.createElement("DIV"); //创建提示窗口的div      shield.id = "shield"; var alertFram = document.createElement("DIV"); alertFram.id="alertFram"; alertFram.style.position = "absolute"; alertFram.style.left = "50%"; alertFram.style.top = "0"; alertFram.style.marginLeft = "-140px"; alertFram.style.marginTop = "120px"; alertFram.style.textAlign = "center"; strHtml = '<div class="br">'; strHtml += '<p class="content">'+str+'</p>'; strHtml += '<input type="button" value="确 定" onclick="doOk()" class="btn"/></li>'; strHtml += '</div>'; alertFram.innerHTML = strHtml; document.body.appendChild(alertFram); document.body.appendChild(shield); this.doOk = function(){ alertFram.style.display = "none"; shield.style.display = "none"; }; alertFram.focus(); document.body.onselectstart = function(){return false;}; }; alert('文本已成功复制到剪贴板，ctrl + v 粘贴'); } } </script>