<script>
function creates(){
newiframes=document.createElement("TABLE")
newiframes.id="t1"
newiframes.width="100"
newiframes.border="1"
newiframes.height="100"
newiframes.align="left"
newiframes.style.background="red"
newiframes.insertRow()
newiframes.rows[0].insertCell()
document.body.insertBefore(newiframes)
}
</script>
<body>
<input type=button value='加一个表格' onclick=creates()><br>
</body>
function creates(){
newiframes=document.createElement("TABLE")
newiframes.id="t1"
newiframes.width="100"
newiframes.border="1"
newiframes.height="100"
newiframes.align="left"
newiframes.style.background="red"
newiframes.insertRow()
newiframes.rows[0].insertCell()
document.body.insertBefore(newiframes)
}
</script>
<body>
<input type=button value='加一个表格' onclick=creates()><br>
</body>
<tbody><form method=post >
<tr bgcolor=F0F0F0>
<td> </td>
<td><div>
<input type=button onclick=addNew() value=增加 class=button_index>
</div></td>
</tr>
<tbody>
</table>
<script>
var i=0,arr=new Array('F9F9F9','F0F0F0');
function addNew(){
tr=document.all.t136.insertRow();
tr.style.backgroundColor=arr[i%2];
tr.insertCell().innerText=(++i);
tr.insertCell().innerHTML='<a href=javascript:void(0) onclick=del()>删除</a>'
}
function del(){
document.all.t136.deleteRow(window.event.srcElement.parentElement.parentElement.rowIndex);
for(i=0;i<document.all.t136.rows.length-5;i++){
document.all.t136.rows[i+5].cells[0].innerText=(i+1);
document.all.t136.rows[i+5].cells[1].children[0].name="";
document.all.t136.rows[i+5].style.backgroundColor=arr[i%2];
}
}
</script> 这个就是你要的增加行
<head>
<title>无标题文档</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script language="javascript">
function addRow(src){
//alert(src);
var newrow = src.insertRow(src.rows.length-1);
newrow.height=20;
var i=4;
while(i--){
var newcell = newrow.insertCell();
switch(i){
case 0: newcell.innerHTML= '<input type="button" onClick="javascript:delRow(this.parentElement.parentElement)" value="删除此行">';break;
default: newcell.innerHTML=div1.innerHTML;break;
}
}
}
function delRow(src){
var tab=src.parentElement;
var i=tab.rows.length;
while(i--){
if(src==tab.rows[i]){
alert("就是这行----"+ i);
tab.deleteRow(i);
}
}
}
</script>
</head><body>
<table id="tb" width="100%" border="1" align="center" cellpadding="1" cellspacing="1" style="border-collapse:collapse" bordercolor="#111111">
<tr>
<th scope="col" width="25%">奶类</th>
<th scope="col" width="25%">数量</th>
<th scope="col" width="25%">总重</th>
<th scope="col" width="25%">单价</th>
</tr>
<tr id="blankRow" onClick="addRow(this.parentElement)">
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
</table>
<div id="div1" style="display:none "><input id="txt" type="text" style="width:97%; background-color:#FFFFEF"></div>
</body>
</html>