<html>
<script language="javascript">
function insertRow(){
var newrow = document.all("tablename").insertRow();
var cell = newrow.insertCell();
cell.innerText="ddddddddddddd"
cell.style.height="20";
cell.style.width="20";
if((document.all("tablename").rows.length)%2==0){
newrow.bgColor ="#ff0000";
}
}</script>
<body>
<table id="tablename" name="tablename"><tr><td></td></tr></table>
<input type=button onclick="insertRow()">
</body>
</html>
<script language="javascript">
function insertRow(){
var newrow = document.all("tablename").insertRow();
var cell = newrow.insertCell();
cell.innerText="ddddddddddddd"
cell.style.height="20";
cell.style.width="20";
if((document.all("tablename").rows.length)%2==0){
newrow.bgColor ="#ff0000";
}
}</script>
<body>
<table id="tablename" name="tablename"><tr><td></td></tr></table>
<input type=button onclick="insertRow()">
</body>
</html>
if((document.all("loginmessage").rows.length)%2==0)
{
newrow.style.backgroundColor="#F2F0EE";
}bgcolor已经deprecated.