#obj50 { z-index:1; width:537px; left:0px; height: 290px; top: 0px;  background-color:#FFFFFF;  } 
#obj51 { z-index:2; width:247px; left:145px; height: 198px; top: 303px;  } 
#obj1 { _height:731px; min-height:731px; }