body
		{
			margin: 10px 0 ;
			padding: 0 ;
			text-align: center ;
			font: 0.8em "Trebuchet MS", helvetica, sans-serif ;
		}
		
div,img,iframe{
  border-radius:10px;
}
#container{
  background-color:white;
  width:1000px;
}
#header, #nav,#main, #content, #footer {
  padding:1px 1px; 								                            
  }
#header {
  height:100px;
  background-color:blue;
  text-align:center;
  color:white;
  }
#content {
  margin-top:10px;
  margin-bottom:10px;
  height: 800px;
  background-color:white;
  }
#main {
  float:right;
  background-color:green;
  height: 800px;
  width:760px;
  }
#nav  {
  margin-left:15px;
  background-color:red;
  height: 800px;
  float:left;
  width:180px;
  }

#footer {
  height: 100px;
  background-color:gray;
  text-align:center;
  clear:both;
  }
ul{
list-style-type: square
 }