3 column layout HTML/CSS

Something like this should do it:

.column-left{ float: left; width: 33.333%; }
.column-right{ float: right; width: 33.333%; }
.column-center{ display: inline-block; width: 33.333%; }

DEMO

EDIT

To do this with a larger number of columns you could build a very simple grid system. For example, something like this should work for a five column layout:

.column {
    float: left;
    position: relative;
    width: 20%;
  
    /*for demo purposes only */
    background: #f2f2f2;
    border: 1px solid #e6e6e6;
    box-sizing: border-box;
}

.column-offset-1 {
    left: 20%;
}
.column-offset-2 {
    left: 40%;
}
.column-offset-3 {
    left: 60%;
}
.column-offset-4 {
    left: 80%;
}

.column-inset-1 {
    left: -20%;
}
.column-inset-2 {
    left: -40%;
}
.column-inset-3 {
    left: -60%;
}
.column-inset-4 {
    left: -80%;
}

<div class="container">
   <div class="column column-one column-offset-2">Column one</div>
   <div class="column column-two column-inset-1">Column two</div>
   <div class="column column-three column-offset-1">Column three</div>
   <div class="column column-four column-inset-2">Column four</div>
   <div class="column column-five">Column five</div>
</div>

Or, if you are lucky enough to be able to support only modern browsers, you can use flexible boxes:

.container {
    display: flex;
}

.column {
    flex: 1;
    
    /*for demo purposes only */
    background: #f2f2f2;
    border: 1px solid #e6e6e6;
    box-sizing: border-box;
}

.column-one {
    order: 3;
}
.column-two {
    order: 1;
}
.column-three {
    order: 4;
}
.column-four {
    order: 2;
}
.column-five {
    order: 5;
}

<div class="container">
   <div class="column column-one">Column one</div>
   <div class="column column-two">Column two</div>
   <div class="column column-three">Column three</div>
   <div class="column column-four">Column four</div>
   <div class="column column-five">Column five</div>
</div>

This is less for @easwee and more for others that might have the same question:

If you do not require support for IE < 10, you can use Flexbox. It's an exciting CSS3 property that unfortunately was implemented in several different versions,; add in vendor prefixes, and getting good cross-browser support suddenly requires quite a few more properties than it should.

With the current, final standard, you would be done with

.container {
    display: flex;
}

.container div {
    flex: 1;
}

.column_center {
    order: 2;
}

That's it. If you want to support older implementations like iOS 6, Safari < 6, Firefox 19 or IE10, this blossoms into

.container {
    display: -webkit-box;      /* OLD - iOS 6-, Safari 3.1-6 */
    display: -moz-box;         /* OLD - Firefox 19- (buggy but mostly works) */
    display: -ms-flexbox;      /* TWEENER - IE 10 */
    display: -webkit-flex;     /* NEW - Chrome */
    display: flex;             /* NEW, Spec - Opera 12.1, Firefox 20+ */
}

.container div {
    -webkit-box-flex: 1;      /* OLD - iOS 6-, Safari 3.1-6 */
    -moz-box-flex: 1;         /* OLD - Firefox 19- */
    -webkit-flex: 1;          /* Chrome */
    -ms-flex: 1;              /* IE 10 */
    flex: 1;                  /* NEW, Spec - Opera 12.1, Firefox 20+ */
}

.column_center {
    -webkit-box-ordinal-group: 2;   /* OLD - iOS 6-, Safari 3.1-6 */
    -moz-box-ordinal-group: 2;      /* OLD - Firefox 19- */
    -ms-flex-order: 2;              /* TWEENER - IE 10 */
    -webkit-order: 2;               /* NEW - Chrome */
    order: 2;                       /* NEW, Spec - Opera 12.1, Firefox 20+ */
}

jsFiddle demo

Here is an excellent article about Flexbox cross-browser support: Using Flexbox: Mixing Old And New

.container{
height:100px;
width:500px;
border:2px dotted #F00;
border-left:none;
border-right:none;
text-align:center;
}
.container div{
display: inline-block;
border-left: 2px dotted #ccc;
vertical-align: middle;
line-height: 100px;
} 
 .column-left{ float: left; width: 32%;  height:100px;}
.column-right{ float: right; width: 32%;  height:100px; border-right: 2px dotted #ccc;}
.column-center{ display: inline-block; width: 33%; height:100px;}

 <div class="container">
   <div class="column-left">Column left</div>
   <div class="column-center">Column center</div>
   <div class="column-right">Column right</div>
</div> 

See this link http://jsfiddle.net/bipin_kumar/XD8RW/2/