JS动态行列 、获取select自定义属性

<script language="javascript" type="text/javascript">

<!--

function addnewline()

{

var row,cell,cell2;

row = document.getElementById("estimateslist").insertRow(-1);

if(row != null ){

cell = row.insertCell(0);

cell.innerHTML="<input type=\"text\" name=\"item\">";

cell2 = row.insertCell(1);

cell2.innerHTML="<input type=\"text\" name=\"timer\" value='--'><input type=\"button\" value=\"delete\" onclick='deleteitem(this)'>";

}

}

function deleteitem(obj){

var rowNum,curRow;

curRow = obj.parentNode.parentNode;

rowNum = document.getElementById("estimateslist").rows.length - 1;

document.getElementById("estimateslist").deleteRow(curRow.rowIndex);

}

-->

</script>

<table width="100%" border="0" id="estimateslist">

<tr>

<td width="150">item </td>

<td>time required</td>

</tr>

<tr>

<td> </td>

<td> </td>

</tr>

</table>

<input type="button" name="button4" id="button4" value="add new line" onClick="addnewline()">

2.

obj.options[obj.selectedIndex].getAttribute("属性名")