/* Dynamically insert an Ajax loading spinner */
function insertAjaxSpinner(contentid) {
	$(contentid).setStyle( 'display', 'none' );
	
	var loadingDiv = new Element('div', {
		'class': 'ajaxLoading',
		'id': 'ajaxLoadingDiv'
	});
	
	loadingDiv.injectAfter( contentid );
}


/* Dynamically remove an Ajax loading spinner */
function removeAjaxSpinner(contentid) {
	$('ajaxLoadingDiv').remove();
	$(contentid).setStyle( 'display', '' );
}


/* Gallery tool */
function gallery_goto( where, total ) {
	if(!where) return false;
	if(where == "previous") {
		if(currentImage < 1) return false;
		currentImage -= 1;
		$('img#galleryImage').attr( 'src', galleryImages[ currentImage ] );		
		$('span#currentImageNumber').html( currentImage+1 );
		$('p#captionText').html( galleryCaptions[ currentImage ] );
	} else if(where == "next") {
		if(currentImage >= total) return false;
		currentImage += 1;
		$('img#galleryImage').attr( 'src', galleryImages[ currentImage ] );		
		$('span#currentImageNumber').html( currentImage+1 );
		$('p#captionText').html( galleryCaptions[ currentImage ] );
	}
}



/* Side column : Search */
function submitForm_Search( form ) {
	if(form.search_q.value == '' || form.search_q.value=='Search...') {
		form.search_q.focus();
		return false;
	}
	q = new String(form.search_q.value);
	if(q.length <= 2) return false;
	q = q.replace(/ /g,"+");

	q = '/search/'+q+'.html';
	window.location=q;
	return false;
}


/* Find a Farm : Search */
function submitForm_FindaFarm( form ) {
	return true;
}


/* Contact us */
function submitForm_contactUs( form ) {
	if(form.name.value=='') {
		alert('Your name is required');
		form.name.focus();
		return false;
	}
	if(form.emailaddress.value=='') {
		alert('Your email address is required');
		form.emailaddress.focus();
		return false;
	}
	if( !emailCheck(form.emailaddress.value) ) {
		return false;
	}
	return true;
}


/* Brochure request */
function submitForm_brochureRequest( form ) {
	if(form.name.value=='') {
		alert('Your name is required');
		form.name.focus();
		return false;
	}
	if(form.address.value=='') {
		alert('Your address is required');
		form.address.focus();
		return false;
	}
	if(form.emailaddress.value=='') {
		alert('Your email address is required');
		form.emailaddress.focus();
		return false;
	}
	if( !emailCheck(form.emailaddress.value) ) {
		return false;
	}
	return true;
}


/* Farm enquiry form */
function submitForm_farmEnquiry( form ) {
	if(form.name.value=='') {
		alert('Your name is required');
		form.name.focus();
		return false;
	}
	if(form.emailaddress.value=='') {
		alert('Your email address is required');
		form.emailaddress.focus();
		return false;
	}
	if( !emailCheck(form.emailaddress.value) ) {
		return false;
	}
//	jQuery.post( form.action, form.serialize() )
	return false;
}


/* Add farm to favourites */
function addToFavourites( farmid ) {
	if(!farmid) return false;
	
	$.ajax({
	  url: "/inlineContent/addToFavourites.ajax.php?farmid="+farmid,
	  cache: false,
	  success: function(html){
		$("#top").after(html);
	  }
	});	
	return;
}


/* Remove farm from favourites */
function removeFromFavourites( farmid ) {
	if(!farmid) return false;
	
	$.ajax({
	  url: "/inlineContent/removeFromFavourites.ajax.php?farmid="+farmid,
	  cache: false,
	  success: function(html){
		$("#top").after(html);
	  }
	});	
	return;
}




function swapTabs( switchToTab ) {
	if(!switchToTab) return false;
	
	if(switchToTab=='selfcatering') {
		$('span#serviceType').html('Self Catering in');
		$('img#tab_selfcatering').attr('src', '/images/tab-sc-on.gif');
		$('img#tab_bandb').attr('src', '/images/tab-bb.gif');

		$('div#map_selfcatering').css({ display: '' });
		$('div#map_bandb').css({ display: 'none' });

		$('div#sideColumn_selfcatering').css({ display: '' });
		$('div#sideColumn_bandb').css({ display: 'none' });
	}
	if(switchToTab=='bandb') {
		$('span#serviceType').html('Bed &amp; Breakfast in');
		$('img#tab_selfcatering').attr('src', '/images/tab-sc.gif');
		$('img#tab_bandb').attr('src', '/images/tab-bb-on.gif');

		$('div#map_selfcatering').css({ display: 'none' });
		$('div#map_bandb').css({ display: '' });

		$('div#sideColumn_selfcatering').css({ display: 'none' });
		$('div#sideColumn_bandb').css({ display: '' });
	}
}


function emailCheck (emailStr) {
/* The following pattern is used to check if the entered e-mail address
   fits the user@domain format.  It also is used to separate the username
   from the domain. */
var emailPat=/^(.+)@(.+)$/
/* The following string represents the pattern for matching all special
   characters.  We don't want to allow special characters in the address. 
   These characters include ( ) < > @ , ; : \ " . [ ]    */
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
/* The following string represents the range of characters allowed in a 
   username or domainname.  It really states which chars aren't allowed. */
var validChars="\[^\\s" + specialChars + "\]"
/* The following pattern applies if the "user" is a quoted string (in
   which case, there are no rules about which characters are allowed
   and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
   is a legal e-mail address. */
var quotedUser="(\"[^\"]*\")"
/* The following pattern applies for domains that are IP addresses,
   rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
   e-mail address. NOTE: The square brackets are required. */
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
/* The following string represents an atom (basically a series of
   non-special characters.) */
var atom=validChars + '+'
/* The following string represents one word in the typical username.
   For example, in john.doe@somewhere.com, john and doe are words.
   Basically, a word is either an atom or quoted string. */
var word="(" + atom + "|" + quotedUser + ")"
// The following pattern describes the structure of the user
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
/* The following pattern describes the structure of a normal symbolic
   domain, as opposed to ipDomainPat, shown above. */
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")


/* Finally, let's start trying to figure out if the supplied address is
   valid. */

/* Begin with the coarse pattern to simply break up user@domain into
   different pieces that are easy to analyze. */
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
  /* Too many/few @'s or something; basically, this address doesn't
     even fit the general mould of a valid e-mail address. */
	alert("Email address seems incorrect (check @ and .'s)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

// See if "user" is valid 
if (user.match(userPat)==null) {
    // user is not valid
    alert("The username doesn't seem to be valid.")
    return false
}

/* if the e-mail address is at an IP address (as opposed to a symbolic
   host name) make sure the IP address is valid. */
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("Destination IP address is invalid!")
		return false
	    }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("The domain name doesn't seem to be valid.")
    return false
}

/* domain name seems valid, but now make sure that it ends in a
   three-letter word (like com, edu, gov) or a two-letter word,
   representing country (uk, nl), and that there's a hostname preceding 
   the domain or country. */

/* Now we need to break up the domain to get a count of how many atoms
   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>3) {
   // the address must end in a two letter or three letter word.
   alert("The address must end in a three-letter domain, or two letter country.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="This address is missing a hostname!"
   alert(errStr)
   return false
}

// If we've gotten this far, everything's valid!
return true;
}