This html and css looks good in IE7 and FireFox, but container-search20 won't line up horizontally to the right of the Flash container - in IE6. The web script I'm using has a seperate IE6 css file and I've played around with the IE6 css, but have been unsuccessful at making it line up horzontally like it does when displayed in IE7 and Firefox. If you can provide assistance to get it to line up in IE6, I'd appreciate it. Thanks. (If your advice is to just forget IE6, no need to reply).

.container-search10
	{
	border:1px solid #E5E5E5;
	background:;
	padding:3px;
	width:965px;
	height:254px;
	float:left;
	margin:5px
	}
	
	.container-search20
	{
	border:1px solid #;
	background:#E5E5E5;
	text-align:left;
	font-size: 11px;
	font-family: arial;
	color: #ffffff;
	margin:0px 0px 0px 0px;
	padding:0px;
	padding-left:0px;
	width:361px;
	height:40px;
	}
	
	.martin
	{
	float:right;
	margin: 0px;
	padding: 0px;
	width:360px;
	height:249px;/*200 + 49 */
}

td.flash {
width:86px;
height:16px;
margin:0px 0px 0px 0px;
float: left:
}

<div class="container-search10">
	<tr><td class="flash">
<iframe src="../jukebox/index.html" frameborder="1" height="252" width="595" scrolling="no">
  </iframe>
  </tr></td>

		<div class="martin">
			<div class="container-search20">
					<form action="login.php" method="post" accept-charset="UTF-8" class="middletext">
							<p>
							<style type="text/css">
								.form_label {
									font-size: 100%;
									color: #000000;
								}
								#user_name_login {
									width: 70px;
								}
								#password_login {
									width: 70px;
								}
							</style>
							<label for="user_name_login" class="form_label">Username&nbsp;</label>
							<input type="text" name="user_name_login" id="user_name_login" size="10" />
							<label for="password_login" class="form_label">Password&nbsp;</label>
							<input type="password" name="password_login" size="10" />
							&nbsp;&nbsp;<input type="image" src="images/login.png" value="[var.lang_login_now]" class="btn_vid2" style="vertical-align:middle" />
							<input type="hidden" name="submitted" value="yes" />
							<input type="hidden" name="remember_me" value="remember_me" />
						</p>
					</form>
				</div><!--container-search20-->
		</div><!--martin-->
	</div><!--container-search10-->

I'll reply anyway, even though I think, as designers, we need to stop supporting IE6 or it will never die it's long overdue death!

We really need to see ALL of the code or a URL to adequately figure out what you're running into, though I suspect you're probably triggering the doubled-float margin bug - which happens when you float an element, then then also have a margin that goes in the same direction as the float.

http://www.positioniseverything.net has a full list of IE's many nasty bugs and how to cure them.

Got it. Thanks anyway