<!DOCTYPE html>
<html>
<head>
<title>new document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gbk"/>
<script type="text/javascript">
window.onload=gaoliang();
//高亮
function gaoliang(){
var a=document.getElementById('table').lastChild;
var trs=document.getElementsByTagName('tr');
for(var i=1;i<trs.length;i++){
trs[i].onmouseover=function(){
this.style.backgroundColor="red";
}
trs[i].onmouseout=function(){
this.style.backgroundColor="blue";
}
}
}
//添加按钮
function tianjia(){
var a=document.getElementById("table").lastChild;
var tr=document.createElement("tr");
var td=document.createElement("td");
td.innerHTML="<input type='text' />";
tr.appendChild(td);
td=document.createElement("td");
td.innerHTML="<input type='text' />";
tr.appendChild(td);
td=document.createElement("td");
td.innerHTML="<a href='#' onClick='shanchu(this)'>删除</a>"; //不能用双引号 用单引号
tr.appendChild(td);
a.appendChild(tr);
gaoliang();
}
//删除按钮
function shanchu(obj){
var a=obj.parentNode.parentNode;
document.getElementById("table").lastChild.removeChild(a);
}
</script>
</head>
<body>
<table border="1px solid black" width="50%" id="table">
<tr>
<th>学号</th>
<th>姓名</th>
<th>操作</th>
</tr>
<tr>
<td>001</td>
<td>小明</td>
<td><a href="#" onClick="shanchu(this)">删除</a></td>
</tr>
<tr>
<td>002</td>
<td>小芳</td>
<td><a href="#" onClick="shanchu(this)">删除</a></td>
</tr>
</table>
<input type="button" value="添加" onClick="tianjia()">
</body>
</html>为什么我在window.onload调用函数不行啊