                        課程
                    
                        /前端開發(fā)
                        
                            /JavaScript
                        
                        /JavaScript進(jìn)階篇

誰能幫我看看哪錯(cuò)了，看了半小時(shí)也沒有看出來

<html>
	<head>
		<title>?new?documents?</title>
		<meta?http-equiv='content-Type'?content?=?'text/html;?charset?=utf-8'?/>
		<script?type?='text/javascript'>
		
			function?addOne(obj){
				var?tbody?=?documents.getElemenById('table').lastChild;
				var?tr?=?document.createElement('tr');
				
				var?td?=?document.createElement('td');
				td.innerHTML?=?"<input?type?=?'text'/>";
				tr.appenChild(td);
				
				td?=?document.createElement('td');
				td.innerHTML="<input?type='text'/>";
				tr.appendChild(td);
				
				td?=?document.createElement('td');
				td.innerHTML=?"<a?href?=?'javascript:;'?onclick?=?'deleteRow(this)'>刪除</a>";
				tr.appenChild(td);
				
				tbody.appenChild(tr);
				Highlight();
			}
			
			function?deleteRow(obj){
				var?tbody?=?document.getElemenById('table').lastChild;
				var?tr?=?obj.parentNode.parentNode;
				tbody.removeChild(tr);
			}
			
			function?Highlight(){
				var?body=?document.getElemenById('table').lastChild;
				trs?=?tbody.getElemenByTagName('tr')
				for?(var?i?=1;i<trs.length;i++){
					trs[i].onmouseover=function(){
					this.style.backgroundColor='#c00';
					}
					trs[i].onmouseout?=function(){
					this.style.backgroundColor='#fff';
					}
				}
			}
		</script>
	</head>
	<body>
		<table?border=?'1'?width?='50%'?id?="table"?onmouseover='Highlight()'>
			<tr>
				<th>學(xué)號(hào)</th>
				<th>姓名</th>
				<th>操作</th>
			</tr>
			
			<tr>
				<td>xh001</td>
				<td>王小明</td>
				<td><a?href?=?'javascript:;'?onclick="deleteRow(this)">?刪除</a><td>
			</tr>
			
			<tr>
				<td>xh002</td>
				<td>劉小芳</td>
				<td><a?href=?'javascript:;'?onclick?="deleteRow(this)">刪除</a></td>
			</tr>
			
		</table>
		<input?type='button'?value="添加一行"?onclick?=?"addOne()"/>
	</body>
</html>