function e(id) {
	return document.getElementById(id);
}

function onRollOver(obj_img){
	obj_img.src =obj_img.src.split("-off").join("-on");	
}

function onRollOut(obj_img){
	obj_img.src = obj_img.src.split("-on").join("-off");
}  


//---------------------- NAVIGATION ---------------//

if (!str_active_nav) {
	var str_active_nav = "blank";
}

var str_current_nav = "";
var nav_timer = "";


function turnOnNav(id) {
	disableNavItem();
	
	if (id != str_active_nav) {
		if (str_active_nav != "blank") {
			disableActiveItem();
		}
	}
	
	clearTimeout(nav_timer);
	if (e(id)) {
		e(id).className = "show";
		
	}
}

function turnOffNav(id) {
	if (e(id)) {
		str_current_nav = id;
		if (str_current_nav != str_active_nav) {
			nav_timer = setTimeout("disableNavItem()", 1000);
		}
		
	}
}

function disableNavItem () {
	if (e(str_current_nav)) {
		e(str_current_nav).className = "hide";
		if (str_active_nav != "blank") {
			enableActiveItem(str_active_nav);
		}
	}
}

function disableActiveItem () {
	if (e(str_active_nav)){
		e(str_active_nav).className = "hide";
	}
}

function enableActiveItem () {
	if (e(str_active_nav)) {
		e(str_active_nav).className = "show";
	}
}

//---------------------------------- HOME NAVIGATION ------------//

function onHomeRollOver(obj,color) {
	if (e(obj)) {
		obj2 = document.getElementById(obj);
	}
	else {
		obj2 = obj;
	}
	obj2.style.backgroundColor = color;
}

function onHomeRollOut(obj,color) {
	if (e(obj)) {
		obj2 = document.getElementById(obj);
	}
	else {
		obj2 = obj;
	}
	obj2.style.backgroundColor = color;
}

//---------------------------------- FORM FIELD CHECKING ------------//

function validate_form(obj,field_array)
{
	//alert('validating form');
	var field_len = field_array.length;
	for(var i=0;i<field_len;i++)
	{
		var field_info = field_array[i];
		var field_id = field_info[0];
		var field_title = field_info[1];
		var field_datatype = field_info[2];
		
		if(field_datatype=='email')
		{
			if(!testEmail(obj,field_id))
			{
				showEmailError(field_title);
				fieldFocus(obj, field_id);
				return false;
			}
		}else if(field_datatype=='string')
		{		
			field_minlength = field_info[3];
			if(!testString(obj,field_id,field_minlength))
			{
				showStringError(field_title, field_minlength);
				fieldFocus(obj, field_id);
				return false;
			}			
		}else if(field_datatype=='combo')
		{
			if(!testCombo(obj,field_id))
			{
				showComboError(field_title);
				fieldFocus(obj, field_id);
				return false;
			}			
		}else if(field_datatype=='checkbox')
		{
			if(!testCheckbox(obj,field_id))
			{
				showCheckboxError(field_title);
				fieldFocus(obj, field_id);
				return false;
			}			
		}else if(field_datatype=='postcode')
		{
			field_length = field_info[3];
			if(!testPostcode(obj, field_id, field_length))
			{
				showPostcodeError(field_title);
				fieldFocus(obj, field_id);
				return false;
			}
		}else if(field_datatype=='date')
		{
			if(!isDate(obj, field_id))
			{
				showDateError(field_title);
				fieldFocus(obj, field_id);
				return false;
			}
		}
		
			
	}
	return true;
}

$(document).ready(function()
{
   	$('#dob').focus(function()
	{
		if($('#dob').val() == 'dd/mm/yyyy') { $('#dob').val(''); }
	});
   
	$('#dob').blur(function()
	{
		if($('#dob').val() == '') { $('#dob').val('dd/mm/yyyy'); }
	});		
});

function fieldFocus(obj, field)
{
	obj[field].focus();
}

// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(obj,field){
	var dtStr = obj[field].value;
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		//alert("The date format should be : dd/mm/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		//alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		//alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		//alert("Please enter a valid date")
		return false
	}
return true
}


function testPostcode(obj,field, requiredLength)
{
	if(obj[field].value.length != requiredLength) { return false; }
	return !isNaN(parseFloat(obj[field].value)) && isFinite(obj[field].value);
}

function testString(obj,field,minLen)
{
	var val = obj[field].value;
	if(val.length < minLen)
	{
		return false;
	}else{
		return true;
	}
}

function testCombo(obj,field)
{
	var val = obj[field].value;
	if(val=='')
	{
		return false;
	}else{
		return true;
	}
}
function testEmail(obj,field)
{

	var val = obj[field].value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(val))
	{
		return true;
	}else{
		return false;
	}
}

function testCheckbox(obj,field)
{
	var val = obj[field].value;
	if(!obj[field].checked)
	{
		return false;
	}else{
		return true;
	}
}

function showEmailError(field)
{
	alert("Invalid email in '" + field + "' field, please fix and re-submit.");
	return false;
}
function showStringError(field,minLen)
{
	alert("Invalid entry in '" + field + "' field, must be at least "+ minLen+" characters in length, please fix and re-submit.");
	return false;
}
function showComboError(field)
{
	alert("Please select item in '" + field + "'.");
	return false;
}

function showCheckboxError(field)
{
	alert("You must accept the terms for '" + field + "'.");
	return false;
}

function showDateError(field)
{
	alert("Please enter a date in the dd/mm/yyyy format '" + field + "' field.");
	return false;
}

function showPostcodeError(field)
{
	alert("Please enter a valid postcode.  It must be a number and exactly four characters.");
	return false;
}

function showError(field)
{
	alert("Invalid entry in '" + field + "' field, please fix and re-submit.");
	return false;
}


/*--------- HOME SUBSCRIBE BOX ------*/

// Basic Element Animator (29-December-2008) DRAFT
// by Vic Phillips http://www.vicsjavascripts.org.uk

// To progressively change the Left, Top, Width, Height or Opacity of an element over a specified period of time.
// With three types of progression 'sin' and 'cos' and liner.

// **** Application Notes

// **** The HTML Code
//
// when moving an element the inline or class rule style position of the element should be assigned as
// 'position:relative;' or 'position:absolute;'.
//
// The element would normally be assigned a unique ID name.
//

// **** Executing the Effect(Script)
//
// The effect is executed by an event call to function 'zxcBAnimator('width#',document.getElementById('tst'),10,800,5000,[10,800],'sin');'
// where:
// parameter 0 = the mode(see Note 2).                                                                     (string)
// parameter 1 = the unique ID name or element object.                                                     (string or element object)
// parameter 2 = the start position of the effect.                                                         (digits, for opacity minimum 0, maximum 100)
// parameter 3 = the finish position of the effect.                                                        (digits, for opacity minimum 0, maximum 100)
// parameter 4 = (optional) period of time between the start and finish of the effect in milliseconds.     (digits or defaults to 2000 milliSeconds)
// parameter 5 = (optional) to scale the effect time on a secified minimum/maximum.                        (array, see Note 5)
//                 field 0 the minimum. (digits)
//                 field 1 the maximum. (digits)
// parameter 6 = (optional) the type of progression, 'sin', 'cos' or 'liner'.                              (string, default = 'liner')
//                'sin' progression starts fast and ends slow.
//                'cos' progression starts slow and ends fast.
//
//  Note 1:  The default units(excepting opacity) are 'px'.
//  Note 2:  Examples modes: 'left', 'top', 'width', 'height', 'opacity.
//           For hyphenated modes, the first character after the hyphen must be upper case, all others lower case.
//  Note 3:  To 'toggle' the effect include '#' in parameter 0.
//           The first call will set the toggle parameters.
//           Subsequent calls with '#' in parameter 0 and the same start and finish parameters will 'toggle' the effect.
//  Note 4:  The function may be re-executed with a different set of parameters (start/finish time or period)
//           whenever required, say from an onclick/mouseover/out event.
//           The period parameter will be retained unless re-specified.
//  Note 5: parameter 5 is of particular use when re-calling the effect
//          in mid travel to retain an constant rate of progression.
//
// **** Advanced Applications
//
//  It may be required to access the current value of the effect.
//  The element effect is accessible from the element property
//  element effect = elementobject[mode.replace(/\W/g,'')+'oop'];
//  where mode is parameter 0 of the initial call.
//  An array storing the current, start and finish values of the element effect may be accessed
//  from the element effect.data as fields 0, 1 and 2 respectively
//

// **** General
//
// All variable, function etc. names are prefixed with 'zxc' to minimise conflicts with other JavaScripts.
// These characters may be changed to characters of choice using global find and replace.
//
// The Functional Code(about 2.06K) is best as an External JavaScript.
//
// Tested with IE7 and Mozilla FireFox on a PC.
//



// **** Functional Code - NO NEED to Change


function zxcBAnimator(mde,obj,srt,fin,ms,scale,curve){
 if (typeof(obj)=='string'){ obj=document.getElementById(obj); }
 if (!obj||(!srt&&!fin)) return;
 var oop=obj[mde.replace(/\W/g,'')+'oop'];
 if (oop){
  clearTimeout(oop.to);
  if (oop.srtfin[0]==srt&&oop.srtfin[1]==fin&&mde.match('#')) oop.update([oop.data[0],(oop.srtfin[0]==oop.data[2])?fin:srt],ms,scale,curve);
  else oop.update([srt,fin],ms);
 }
 else obj[mde.replace(/\W/g,'')+'oop']=new zxcBAnimatorOOP(mde,obj,srt,fin,ms,scale,curve);
}

function zxcBAnimatorOOP(mde,obj,srt,fin,ms,scale,curve){
 this.srtfin=[srt,fin];
 this.to=null;
 this.obj=obj;
 this.mde=mde.replace(/\W/g,'');
 this.update([srt,fin],ms,scale,curve);
}

zxcBAnimatorOOP.prototype.update=function(srtfin,ms,scale,curve){
 this.time=ms||this.time||2000;
 this.data=[srtfin[0],srtfin[0],srtfin[1]];
 this.ms=this.time*(!scale?1:Math.abs((srtfin[1]-srtfin[0])/(scale[1]-scale[0])));
 this.curve=(typeof(curve)=='string')?curve.charAt(0).toLowerCase():(this.curve)?this.curve:'x';
 this.inc=Math.PI/(2*this.ms);
 this.srttime=new Date().getTime();
 this.cng();
}

zxcBAnimatorOOP.prototype.cng=function(){
 var ms=new Date().getTime()-this.srttime;
 this.data[0]=(this.curve=='s')?Math.floor((this.data[2]-this.data[1])*Math.sin(this.inc*ms)+this.data[1]):(this.curve=='c')?(this.data[2])-Math.floor((this.data[2]-this.data[1])*Math.cos(this.inc*ms)):(this.data[2]-this.data[1])/this.ms*ms+this.data[1];
 if (this.mde!='left'&&this.mde!='top'&&this.data[0]<0) this.data[0]=0;
 if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
 else  zxcOpacity(this.obj,this.data[0]);
 if (ms<this.ms) this.to=setTimeout(function(oop){return function(){oop.cng();}}(this),10);
 else {
  this.data[0]=this.data[2];
  if (this.mde!='opacity') this.obj.style[this.mde]=this.data[0]+'px';
  else zxcOpacity(this.obj,this.data[0]);
 }
}

function zxcOpacity(obj,opc){
 if (opc<0||opc>100) return;
 obj.style.filter='alpha(opacity='+opc+')';
 obj.style.opacity=obj.style.MozOpacity=obj.style.KhtmlOpacity=opc/100-.001;
}

function showd(obj,id,lft,top) {
 var el = document.getElementById(id);
 el.style.display = "block";
 el.style.left=zxcPos(obj)[0]+lft+'px';
 el.style.top=zxcPos(obj)[1]+top+'px';
 zxcBAnimator('width',el,0,el.offsetWidth,1000);
}

function zxcPos(obj){
 var rtn=[obj.offsetLeft,obj.offsetTop];
 while(obj.offsetParent!=null){
  var objp=obj.offsetParent;
  rtn[0]+=objp.offsetLeft-objp.scrollLeft;
  rtn[1]+=objp.offsetTop-objp.scrollTop;
  obj=objp;
 }
 return rtn;
}