Try using a style sheet between head tags on your page and attribute that unique style sheet id to your table.
<table id="my_table" ...
Example:
HTML Code:
<head>
<style type="text/css">
table.my_table {
width: 90%;
border-width: 0px;
border-color: #FFFFFF;
}
table.my_table tr {
border-width: 0px;
padding: 0px;
border-color: #FFFFFF;
}
</style>
</head>
<body>
<table id="my_table">
<tr>
<td>some stuff here</td>
<td>more stuff here</td>
</tr>
</table>
</body>