// JavaScript Document
// ----------------------------------------------------------------------
// Javascript form validation routines.
// Author: Stephen Poley
//
// Simple routines to quickly pick up obvious typos.
// All validation routines return true if executed by an older browser:
// in this case validation must be left to the server.
//
// Update Aug 2004: have tested that IE 5.0 and IE 5.5 both support DOM model
// sufficiently well, so innerHTML option removed (redundant).
//
// Update Jun 2005: discovered that reason IE wasn't setting focus was
// due to an IE timing bug. Added 0.1 sec delay to fix.
// ----------------------------------------------------------------------

var nbsp = 160;    // non-breaking space char
var node_text = 3; // DOM text node-type
var emptyString = /^\s*$/
var glb_vfld;      // retain vfld for timer thread

var sectionFields = 0;
var shipMode = 0;

// -----------------------------------------
//                  trim
// Trim leading/trailing whitespace off string
// -----------------------------------------

function trim(str)
{
  return str.replace(/^\s+|\s+$/g, '')
};

function validateEmail  (vfld,   // element to be validated
                         ifld,   // id of element to receive info/error msg
                         reqd)   // true if required
{
  var stat = commonCheck (vfld, ifld, reqd);
  if (stat != proceed) 
  {
	  enableSend(0, false);
	  return stat;
  }

  var tfld = trim(vfld.value);  // value of field with whitespace trimmed off
  var email = /^[^@]+@[^@.]+\.[^@]*\w\w$/
  if (!email.test(tfld)) {
    msg (ifld, "nocountrywarn", "not valid");
    setfocus(vfld);
	enableSend(0, false);
    return false;
  }

  var email2 = /^[A-Za-z][\w.-]+@\w[\w.-]+\.[\w.-]*[A-Za-z][A-Za-z]$/
 	enableSend(0, true);
	  
	if (!email2.test(tfld)) 
  {
    msg (ifld, "nocountrywarn", "Are you sure?");
  }
  else
    msg (ifld, "nocountrywarn", "");
  return true;
};


function validateOrder(vfld,
					   ifld,
					   reqd)
{
	var stat = commonCheck (vfld, ifld, reqd);
  	if (stat != proceed) return stat;
	
	var tfld = trim(vfld.value);
	var orderId = 0;
	try
	{
		orderId = parseInt(tfld);
	}
	catch(ex)
	{
	}
	if(orderId > 2000 && orderId < 12000)
	{
		msg (ifld, "nocountrywarn", "");
		enableSend(1, true);
	}
	else
	{
		msg (ifld, "nocountrywarn", "not valid");
		enableSend(1, false);
	}
}


  function validateContactEmail() {
    var elem;
    var errs=0;
    // execute all element validations in reverse order, so focus gets
    // set to the first one in error.
    if (!validateEmail  (document.forms.contact.email, 'inf_email', true)) errs += 1; 
    if (errs>1)  alert('There are fields which need correction before sending');
    if (errs==1) alert('Please enter a valid email');
    return (errs==0);
  };

// -----------------------------------------
//            commonCheck
// Common code for all validation routines to:
// (a) check for older / less-equipped browsers
// (b) check if empty fields are required
// Returns true (validation passed), 
//         false (validation failed) or 
//         proceed (don't know yet)
// -----------------------------------------

var proceed = 2;  

function commonCheck    (vfld,   // element to be validated
                         ifld,   // id of element to receive info/error msg
                         reqd)   // true if required
{
  if (!document.getElementById) 
    return true;  // not available on this browser - leave validation to the server
  var elem = document.getElementById(ifld);
  if (!elem.firstChild)
    return true;  // not available on this browser 
  if (elem.firstChild.nodeType != node_text)
    return true;  // ifld is wrong type of node  

  if (emptyString.test(vfld.value)) {
    if (reqd) {
      msg (ifld, "nocountrywarn", "ERROR: required");  
      setfocus(vfld);
      return false;
    }
    else {
      msg (ifld, "nocountrywarn", "");   // OK
      return true;  
    }
  }
  return proceed;
}

// -----------------------------------------
//            validatePresent
// Validate if something has been entered
// Returns true if so 
// -----------------------------------------

function validatePresent(vfld,   // element to be validated
                         ifld )  // id of element to receive info/error msg
{
  var stat = commonCheck (vfld, ifld, true);
  if (stat != proceed) return stat;

  msg (ifld, "nocountrywarn", "");  
  return true;
};

// -----------------------------------------
//                  setfocus
// Delayed focus setting to get around IE bug
// -----------------------------------------

function setFocusDelayed(vfld)
{
  glb_vfld.focus()
}

function setfocus(vfld)
{
  glb_vfld = vfld;
  setTimeout( 'setFocusDelayed()', 100 );
}


// -----------------------------------------
//                  msg
// Display warn/error message in HTML element
// commonCheck routine must have previously been called
// -----------------------------------------

function msg(fld,     // id of element to display message in
             msgtype, // class to give element ("warn" or "error")
             message) // string to display
{
  // setting an empty string can give problems if later set to a 
  // non-empty string, so ensure a space present. (For Mozilla and Opera one could 
  // simply use a space, but IE demands something more, like a non-breaking space.)
  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;   // set the CSS class to adjust appearance of message
};


function enableSend(section, status)
{
	var field = 1 << section;
	var submitButton = document.forms[0].smt;
	if(status)
	{
		sectionFields |= section;
	}
	else
	{
		sectionFields &= ~section;
	}
	
	if((shipMode == 0 && sectionFields > 0) ||
		(sectionFields > 2))
	{
	//	submitButton.disabled = false;
	}
	else
	{
	//	submitButton.disabled = true;
	}
	
}