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帮忙寻找一下错误

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title></title>

<script type="text/javascript">

window.onload=function(){

var otab=document.getElementById("tab");

var txt1=document.getElementById("name");

var txt2=document.getElementById("age");

var btn=document.getElementById("bt")

var oid=otab.tBodies[0].rows.length+1;

}

btn.onclick=function(){

var otr=document.createElement("tr");

var otd=document.createElement("td");

otd.innerHTML=oid++;

otr.appendChild(otd);

var otd=document.createElement("td");

otd.innerHTML=txt1.value;

otr.appendChild(otd);

var otd=document.createElement("td");

otd.innerHTML=txt2.value;

otr.appendChild(otd);

var otd=document.createElement("td");

otd.innerHTML='<a herf="javscript:;">删除<a>';

otr.appendChild(otd);

otd.document.getElementsByTagName("a")[0].onclick=function(){

}

otab.tBodies[0].appendChild(tr);

}

</script>

</head>

<body>

<input type="text"  id="name"/>

<input type="text"  id="age"/>

<input type="button" value="添加" id="bt"/>

<table border="1" cellspacing="" cellpadding="" id="tab" style="width: 400px;">

<thead>

<td>ID</td>

<td>姓名

</td>

<td>年龄</td>

<td>操作</td>

</thead>

   <tbody>

    <tr>

    <td>1</td>

    <td>一</td>

    <td>10</td>

    <td></td>

    </tr>

    <tr>

    <td>2</td>

    <td>二</td>

    <td>20</td>

    <td></td>

    </tr>

    <tr>

    <td>3</td>

    <td>三</td>

    <td>30</td>

    <td></td>

    </tr>

    <tr>

    <td>4</td>

    <td>四</td>

    <td>40</td>

                    <td></td>

    </tr>

    <tr>

    <td>5</td>

    <td>五</td>

    <td>50</td>

    <td></td>

    </tr>

   </tbody>

</table>

</body>

</html>


Youruncle
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1回答

慕粉3769977

<script type="text/javascript">window.onload=function(){    var otab=document.getElementById("tab");    var txt1=document.getElementById("name");    var txt2=document.getElementById("age");    var btn=document.getElementById("bt")    var oid=otab.tBodies[0].rows.length+1;    btn.onclick=function(){        var otr=document.createElement("tr");        var otd=document.createElement("td");        otd.innerHTML=oid++;        otr.appendChild(otd);        var otd=document.createElement("td");        otd.innerHTML=txt1.value;        otr.appendChild(otd);        var otd=document.createElement("td");        otd.innerHTML=txt2.value;        otr.appendChild(otd);        var otd=document.createElement("td");        otd.innerHTML='<a herf="javscript:;">删除<a>';        otr.appendChild(otd);        otd.getElementsByTagName("a")[0].onclick=function(){        }        otab.tBodies[0].appendChild(otr);    }}</script>
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