var nbsp = 160;    

var node_text = 3;

var emptyString = /^\s*$/

var glb_vfld;      







function trim(str)

{

  return str.replace(/^\s+|\s+$/g, '')

};









function setFocusDelayed()

{

  glb_vfld.focus()

}



function setfocus(vfld)

{

 

  glb_vfld = vfld;

  setTimeout( 'setFocusDelayed()', 100 );

}







function msg(fld,     

             msgtype, 

             message) 

{



  var dispmessage;

  if (emptyString.test(message)) 

    dispmessage = String.fromCharCode(nbsp);    

  else  

    dispmessage = message;



  var elem = document.getElementById(fld);

  elem.firstChild.nodeValue = dispmessage;  

  

  elem.className = msgtype;   

};







var proceed = 2;  



function commonCheck    (vfld,   

                         ifld,   

                         reqd)  

{

  if (!document.getElementById) 

    return true;  

  var elem = document.getElementById(ifld);

  if (!elem.firstChild)

    return true;  

  if (elem.firstChild.nodeType != node_text)

    return true;  



  if (emptyString.test(vfld.value)) {

    if (reqd) {

      msg (ifld, "error", "- this is a required field");  

      setfocus(vfld);

      return false;

    }

    else {

      msg (ifld, "warn", "");   

      return true;  

    }

  }

  return proceed;

}







function validatePresent(vfld,   

                         ifld )  

{

  var stat = commonCheck (vfld, ifld, true);

  if (stat != proceed) return stat;



  msg (ifld, "warn", "");  

  return true;

};





function validateEmail  (vfld,   

                         ifld,  

                         reqd)   

{

  var stat = commonCheck (vfld, ifld, reqd);

  if (stat != proceed) return stat;



  var tfld = trim(vfld.value);  

  var email = /^[^@]+@[^@.]+\.[^@]*\w\w$/

  if (!email.test(tfld)) {

    msg (ifld, "error", "This is not a valid e-mail address");

    setfocus(vfld);

    return false;

  }



  var email2 = /^[A-Za-z][\w.-]+@\w[\w.-]+\.[\w.-]*[A-Za-z][A-Za-z]$/

  if (!email2.test(tfld)) 

    msg (ifld, "warn", "Unusual e-mail address - check if correct");

  else

    msg (ifld, "warn", "");

  return true;

};









function validateTelnr  (vfld,   

                         ifld,   

                         reqd)   

{

  var stat = commonCheck (vfld, ifld, reqd);

  if (stat != proceed) return stat;



  var tfld = trim(vfld.value);  

  var telnr = /^\+?[0-9 ()-]+[0-9]$/

  if (!telnr.test(tfld)) {

    msg (ifld, "error", "ERROR: not a valid telephone number. Characters permitted are digits, space ()- and leading +");

    setfocus(vfld);

    return false;

  }



  var numdigits = 0;

  for (var j=0; j<tfld.length; j++)

    if (tfld.charAt(j)>='0' && tfld.charAt(j)<='9') numdigits++;



  if (numdigits<6) {

    msg (ifld, "error", "ERROR: " + numdigits + " digits - too short");

    setfocus(vfld);

    return false;

  }



  if (numdigits>14)

    msg (ifld, "warn", numdigits + " digits - check if correct");

  else { 

    if (numdigits<10)

      msg (ifld, "warn", "Only " + numdigits + " digits - check if correct");

    else

      msg (ifld, "warn", "");

  }

  return true;

};





function validateAge    (vfld,   

                         ifld,  

                         reqd)  

{

  var stat = commonCheck (vfld, ifld, reqd);

  if (stat != proceed) return stat;



  var tfld = trim(vfld.value);

  var ageRE = /^[0-9]{1,3}$/

  if (!ageRE.test(tfld)) {

    msg (ifld, "error", "ERROR: not a valid age");

    setfocus(vfld);

    return false;

  }



  if (tfld>=200) {

    msg (ifld, "error", "ERROR: not a valid age");

    setfocus(vfld);

    return false;

  }



  if (tfld>110) msg (ifld, "warn", "Older than 110: check correct");

  else {

    if (tfld<7) msg (ifld, "warn", "Bit young for this, aren't you?");

    else        msg (ifld, "warn", "");

  }

  return true;

};