Divvar överlappar

#container
{
	float: left;
}

#container canvas
{ 
	border: 5px dotted #03a550; 
	margin-top: 5px;
	margin-left: 5px;
	box-shadow: 5px 5px 5px #a9a3a3;
} 

#sidebar
{
	float: left;
	width: 900px;
	height: 300px;
	overflow: auto;
	margin-left: 5px;
	margin-top: 0px;
	border: 1px solid black;
}