force div to surround another div - html

Question

At the moment I have a parent div containing 2 div's, both div's have their own border. What I try to do is to have 1 div in the left top corner and the other div surround it on the right and bottom with margin between them. Just like the image below:
Is this even possible, using css3 and html5?
Edit: Here is the layout of the div's.
<div id="main">
<div id="leftdiv">
Here is some text and an image displayed
</div>
<div id="rightdiv">
<div class="profile"><h4>Some text</h4><img src="...."></div>
<div class="profile"><h4>Some text</h4><img src="...."></div>
<div class="profile"><h4>Some text</h4><img src="...."></div>
<div class="profile"><h4>Some text</h4><img src="...."></div>
<div class="profile"><h4>Some text</h4><img src="...."></div>
..............
</div>
</div>

Answer 1

You could try to fake this effect with pseudo-elements for the top-left container.
.first {
position: relative;
float: left;
height: 30px;
width: 30px;
border: 1px solid black;
margin: 0 5px 5px 0;
}
.first:after {
content: '';
position: absolute;
top: -1px;
right: -5px;
height: 35px;
width: 3px;
background-color: #fff;
border-right: 1px solid black;
}
.first:before {
content: '';
position: absolute;
bottom: -5px;
left: -1px;
height: 3px;
width: 35px;
background-color: #fff;
border-bottom: 1px solid black;
}
.second {
height: 80px;
width: 100px;
border: 1px solid black;
}
See this fiddle:
http://jsfiddle.net/fqsDp/2/

Answer 2

I have the following in jsfiddle.com:
#main {
float: left;
width: 400px;
}
#leftdiv {
float: left;
margin: 0 0.5em 0.5em 0;
background: green;
color: black;
width: 150px;
height: 150px;
background: rgb(255,255,255);
background: url(data:image/svg+xml;base64,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);
background: -moz-linear-gradient(top, rgba(255,255,255,1) 0%, rgba(219,219,219,1) 100%);
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(255,255,255,1)), color-stop(100%,rgba(219,219,219,1)));
background: -webkit-linear-gradient(top, rgba(255,255,255,1) 0%,rgba(219,219,219,1) 100%);
background: -o-linear-gradient(top, rgba(255,255,255,1) 0%,rgba(219,219,219,1) 100%);
background: -ms-linear-gradient(top, rgba(255,255,255,1) 0%,rgba(219,219,219,1) 100%);
background: linear-gradient(to bottom, rgba(255,255,255,1) 0%,rgba(219,219,219,1) 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#dbdbdb',GradientType=0 );
border: 1px solid #E2E2E2;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
}
#rightdiv {
background: rgb(255,255,255);
background: url(data:image/svg+xml;base64,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);
background: -moz-linear-gradient(top, rgba(255,255,255,1) 0%, rgba(219,219,219,1) 100%);
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(255,255,255,1)), color-stop(100%,rgba(219,219,219,1)));
background: -webkit-linear-gradient(top, rgba(255,255,255,1) 0%,rgba(219,219,219,1) 100%);
background: -o-linear-gradient(top, rgba(255,255,255,1) 0%,rgba(219,219,219,1) 100%);
background: -ms-linear-gradient(top, rgba(255,255,255,1) 0%,rgba(219,219,219,1) 100%);
background: linear-gradient(to bottom, rgba(255,255,255,1) 0%,rgba(219,219,219,1) 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#dbdbdb',GradientType=0 );
border: 1px solid #E2E2E2;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
}
http://jsfiddle.net/5unJw/