making textbox borders disappear

im trying to make the border of a textfield invisable its driving me nuts i’ve tried everything. my code is below please could someone tell me what im doing wrong.

<form name=”form1″ method=”post” action=””>
<input type=”text” name=”textfield” readonly=”true” value=”hello world” [B]style=” border-style:none”[/B] >
</form>

thanks in advance john.

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