body 
{   
    margin-top:10px;
    font-size:12px;
    font-family:"宋体","Verdana","Arial", "Helvetica","sans-serif";
  }
A
{
    cursor:hand;
    color:#474747;
    text-decoration:none;
    
    }
#mainDiv
{
	width:940px; text-align:center;}
.positionDiv
{
    text-align:center;  #position: absolute; #top: 50%; #left: 50%; display: table-cell; vertical-align: middle;}
.positionVPlus
{
    #position:absolute; #top:50%; display:table-cell; vertical-align:middle;}