#MainDiv
{
    width: 690px;
    margin-top: 10px;
    /*margin-Bottom: 10px;*/
    margin-right: auto;
    margin-left: auto;
    position: relative;
    
    border: 1px solid #2F4251;
    padding: 10px;
    background: #D3DCE3;
}

#MainDivLeftCol
{
    border: 1px solid #2F4251;
    float: left;
    width: 238px; /*position: relative; */
}

#MainDivRightCol
{
    margin-left: 247px;
    border: 1px solid #2F4251;
  /*  position:relative; */
}

.leftblock
{
    border: 1px solid #D3DCE3;
    height: 304px;
    padding: 10px;
    margin-bottom: 10px;
    background: url(Images/leftcolumn.png) repeat-y;
    vertical-align: top;
}

 .rightblock
{
    border: 1px solid #D3DCE3;
    padding: 10px;
    margin-bottom: 10px;
    background: #D3DCE3;
    position: relative;
    width:auto;
    height:auto;
}