function setsize()
{
      var tbl1=document.getElementById("maincontent")
      var tbl2=document.getElementById("rightelastic")
      var tbl3=document.getElementById("leftelastic")
      var tbl4=document.getElementById("newdesign")

            tbl2.height=tbl1.offsetHeight-tbl4.offsetHeight-457;
            tbl2.style.height=tbl1.offsetHeight-tbl4.offsetHeight-457;            

            tbl3.height=tbl1.offsetHeight-1609;
            tbl3.style.height=tbl1.offsetHeight-1609;            
}