Div within a Div - html

Question

I've got this problem, I've placed a div within a div, I've positioned the "title" to be height 50, and then "navbar" below it, so I've put height 100% though the thing is, its not staying within the div, its actually straying away from and out of the div and making a scrollbar appear.
I would love "site" to hog the walls and then all the other div fit in that div.
<div id="site">
<div id="title">TitleBar</div>
<div id="navbar">NavBar</div>
<div id="frame">FrameBar</div>
</div>
body{
margin: 0;
}
#site{
position:absolute;
width: 100%;
height: 100%;
*border: 1px solid #333;
}
#title{
border: 1px solid #333;
height: 50;
}
#navbar{
border: 1px solid #c38a8a;
width: 200;
height: 100%;
}
I've found an image that shows something similar.
http://img176.imageshack.us/img176/4637/picture1zb1.png

Answer 1

that's because 100% height actually means "use the same height as the container".
But I didn't quite get all your requirements for this layout, if your navbar is a navigation bar, it should be designed in a way that allows scrollbars to appear when the content is too big.
But I think you're going for the wrong structure to accomplish this, is there any actual reason you want a wrapper div? I've created a fiddle on this, check if this is closer to what you wanted: http://jsfiddle.net/6g6HV/2/
This other one is yours, in case you wanna play with it: http://jsfiddle.net/yq8PS/3/
Edit: Adding the javascript solution to the answer http://jsfiddle.net/6g6HV/9

Answer 2

You can make divisions in HTML appear side by side to each other by adding a float property to the css.
#navbar{
border: 1px solid #c38a8a;
width: 200px;
height: 100%;
float: left;
}
Additionally, always add the 'px' unit after a size. Modern browsers assume you mean px, but older ones might not.
There isn't a good way to prevent the overlapping when you have a sidebar that is a set pixel width. To achieve the liquid width (or fluid width) style, you would have to add negative 200px margin on the left to the #frame (to counter sidebar). Then, add another divsion inside the #frame to do the styling for that portion. This is how I have achieved the look on my web site, and it's also the solution used in the previous default Drupal theme (Garland).
#frame{
margin-left: -200px;
}

Answer 3

IN this context, 100% for the Navbar doesn't mean the remaining height but 100% of the visible heigth of the parent; so if the parent has a height of 400px then Navbar will also have an height of 400px. If you add to this size the height of the title bar, you get a total value greater than the size of the parent; therefore the appearance of the scolling bar.
While there is usually no problem with the width to make it appears to fill the whole length of a screen, it's very difficult in HTML & CSS to do the same with the height as they have not been designed for this sort of thing; especially with an imbricated structure (div inside div).
Some people will use Javascript to get the size of the screen (browser) and compute the size of their objects accordingly but I don't know if you can do the same with a pure HTML/CSS solution; especially if you want to have your solution compatible accross many browsers.
For more info, take a look at http://www.tutwow.com/htmlcss/quick-tip-css-100-height/