CSS <div> Problem

[Voodum]

[a href=\"http://img174.imageshack.us/img174/6529/space4jd.jpg\" target=\"_blank\"]The problem[/a]

Thats the link to a picture of the problem. I dont know why it does it, but it adds the spacing between the divs.
Ive tried putting them on the same line, and making the margin and padding to 0, but I've had no luck so far.

The CSS code is below, and then followed by the html code.

[code]
.arttop {
background:url(images/index_08.jpg) repeat-x;
height:70px;
margin:0;
padding:0;
}

.mainbg {
background:url(images/index_10.jpg) repeat-x #FFFFFF;
border-left:#CCCCCC solid 1px;
border-right:#CCCCCC solid 1px;
margin:0;
padding:0;
}

.bar {
background:url(images/index_12.jpg) repeat-x;
height:25px;
margin:0;
padding:0;
}
[/code]

Now for the html

[code]<div class="arttop">hi</div>
<div class="mainbg">
  <p>hi</p>
  <p>h</p>
  <p>h</p>
  <p>h</p>
  <p>h</p>
  <p>h</p>
</div>
<div class="bar">hi</div>[/code]

[moberemk]

At the start of all my CSS code, I tend to use this:
[code]* { margin: 0px; padding: 0px; } [/code]
This way, I'm the only one who specifies padding and borders.
Is the background image shorter then the <div> itself? If it is, try making it smaller.
If that doesn't work, try giving either element either a negative top or a negative bottom margin.

[Voodum]

Negative margins worked a treat! Many thanks. [img src=\"style_emoticons/[#EMO_DIR#]/laugh.gif\" style=\"vertical-align:middle\" emoid=\":laugh:\" border=\"0\" alt=\"laugh.gif\" /]

[wildteen88]

rather than use negiyive margins reduce the height of your .arttop class by 2 or 3 pixels as I think you have set the height too high or something and so you get that 2 or 3 pixs white line.

[nogray]

If the height might change based on content, you can add a background color to cover up the gab.

It's always a good idea to add a background color of the last pixel of you background image when you repeat-x or y

Something like this

[code].arttop {
background:url(images/index_08.jpg) repeat-x #186b9f;
height:70px;
margin:0;
padding:0;
}[/code]