#container_left-nav_3-column {
	width: 100%;
	margin: 0 auto;
}
#left_column {
  float: left; /* this element must precede in the source order any element you would like it be positioned next to */
  width: 214px;
}
#right_column {
  float: right; /* this element must precede in the source order any element you would like it be positioned next to */
  width: 36%;
  padding: 0;
  margin: 0 0 22px 22px;
  background-color: #ffffff;
}
#center_column {
  margin: 0 36%/*matches right column width*/ 0 214px/*matches left column width*/; /* the right and left margins on this div element creates the two outer columns on the sides of the page. No matter how much content the sidebar divs contain, the column space will remain. You can remove this margin if you want the #mainContent div's text to fill the sidebar spaces when the content in each sidebar ends. */
  padding: 0 0 0 22px;
}
.clearfloat { /* this class should be placed on a div or break element and should be the final element before the close of a container that should fully contain its child floats */
  clear: both;
  height: 0;
  font-size: 1px;
  line-height: 0px;
}