Make Height Of Two Table Cell Equal

<script>
function makesame()
{
      var tbl1=document.getElementById("table1")
      var tbl2=document.getElementById("table2")
  
      if(tbl1.offsetHeight>tbl2.offsetHeight)
      {
            tbl2.height=tbl1.offsetHeight+'px';
      }
      else
      {
            tbl1.height=tbl2.offsetHeight+'px';
      }
}
</script>