<script language="javascript">
function kt()
   {
   if  (document.choi.maso.value=="")
        {
        alert("Ban nhap ma so tro choi chua dung");
        document.choi.maso.focus();
        return false;
        }
   var chieudai = document.choi.maso.value.length;

     if  (chieudai < 4)
        {
          for (i=0; i< (4 - chieudai);i++)
             {
                document.choi.maso.value="0" +document.choi.maso.value;
             }
        }
     else
       {
          document.choi.submit();
       }
  }

function mobile()
{
  window.open("mobile.htm", "help", "toolbar=no,location=no,directories=no,status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width=461, height=380");
}

 function kt1()
   {

   if  (document.play.maso.value=="")
        {
        alert("Ban chua nhap ma so tro choi");
        document.play.maso.focus();
        return false;
        }
   var chieudai = document.play.maso.value.length;
     if  (chieudai < 4)
        {
          for (i=0; i< (4 - chieudai);i++)
             {
                document.play.maso.value="0" +document.play.maso.value;
             }
        }
     else
       {
          document.play.submit();
       }
  }

  function kt2()
   {
   if  (document.tim.tk.value=="")
        {
        alert("Ban chua nhap ten tro choi can tim");
        document.tim.tk.focus();
        return false;
        }
  else
       {
          document.tim.submit();
       }
  }

function copyit()
{
var mylink=window.location.href;
      if( window.clipboardData && clipboardData.setData )
      {
            clipboardData.setData("Text", mylink);
      }
}
</script>
