body { 
text-align: center;
} 
  
#container { 
  width: 1000px; 
  margin: 0 auto;  
  padding: 0;
  text-align: left;
  } 
  
#leftside { 

  float: left; 
  width: 210px; 
  margin: 10px 0 0 0; 
  padding: 0 0 0 10px;
  -moz-box-sizing:border-box;
  box-sizing:border-box;  
  } 

#rightside { 
  float: left; 
  width: 210px;
  margin: 10px 0 0 0px; 
  padding: 0 0 0 10px; 
  -moz-box-sizing:border-box;
  box-sizing:border-box;  
    
  } 
 
#content { 
  text-align : center; 
  float: left; 
  width: 560px; 
  padding: 10px 0 0 0;  
  margin: 0;
  } 
   
.clear { 
  clear: both; 
  } 
  
#footer { 
  text-align: center; 
  float: right; 
  width: 1000px; 
  }