function check_dangky(okk)
{
if (okk.username.value == "")
  {
    alert("Chua nhap Email");
   okk.username.focus();
    return (false);
  }
        if (okk.password.value == "")
  {
    alert("mienphi24h.net - Chua nhap mat khau");
   okk.password.focus();
    return (false);
  }
  
        if (okk.repassword.value == "")
  {
    alert("mienphi24h.net - lap lai mat khau");
   okk.repassword.focus();
    return (false);
  }
      if (okk.name.value == "")
  {
    alert("Chua nhap ho ten");
   okk.name.focus();
    return (false);
  }

  }
  function check_dangnhap(okk)
{
if (okk.username.value == "")
  {
    alert("mienphi24h.net - Chua nhap Email dang nhap");
   okk.username.focus();
    return (false);
  }
        if (okk.password.value == "")
  {
    alert("mienphi24h.net - Chua nhap mat khau dang nhap");
   okk.password.focus();
    return (false);
  }
  
  }
  //########### Check tin rao ############
function chontatcarv(){
			fiel = document.fromktrv.elements['rvid[]'];
			for (i = 0; i < fiel.length; i++)
				fiel[i].checked = true ;
		}

		function bochontatcarv(){
			fiel = document.fromktrv.elements['rvid[]'];
			for (i = 0; i < fiel.length; i++)
				fiel[i].checked = false ;
		}

		function ktsubmitrv(){
			 if (confirm("mienphi24h.net - Ban thuc su muon xoa bo no ?")){	
				//return true;
				document.fromktrv.submit();
			  }	
			  else{
				return false;
			  }							
		}