body
{
  margin: 0;
  padding: 0;
  border: 0;
  background: #fff;
  min-width: 500px; 
}
#header
{
    width: 1000px;
    margin:0 auto;
  
}

#main-container
{
  clear:left;
  position:relative;
    width: 1000px;
  overflow: hidden; 
  margin:0 auto;
}

#main-content
{
position:relative;
  margin: 0 5px 5px 5px;
  border:0;
  float: left;
  width: 590px;
}

#left-sidebar
{

  margin:0;
  border:0;
  padding: 0 0 0 5px ;
  float: left;
  width: 195px;
  position: relative;
  
  padding-bottom: 99999px;
  margin-bottom: -99999px;
  overflow:hidden;

}
#right-sidebar
{
position:relative;
  margin:0;
  border:0;
  
  float: left;
  float:right;
  width:200px;
  
  padding-bottom: 999px;
  margin-bottom: -999px;
  margin-right:0;
}


#footer
{
  clear: both;
  float: left;
  width: 100%;
 
}

.clearfloat { /* 此类应当放在 div 或 break 元素上，而且该元素应当是完全包含浮动的容器关闭之前的最后一个元素 */
    clear:both;
    height:0;
    font-size: 1px;
    line-height: 0px;
}