NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
DOM = (document.getElementById) ? 1 : 0;
ver4 = (NS4 || IE4) ? 1 : 0;

VOUCHERS_CATID = 17;

//Events Functions
//------------------------------------------------------
function addEvent( obj, type, fn ) {
  if ( obj.attachEvent ) {
    obj['e'+type+fn] = fn;
    obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
    obj.attachEvent( 'on'+type, obj[type+fn] );
  } else
    obj.addEventListener( type, fn, false );
}
function removeEvent( obj, type, fn ) {
  if ( obj.detachEvent ) {
    obj.detachEvent( 'on'+type, obj[type+fn] );
    obj[type+fn] = null;
  } else
    obj.removeEventListener( type, fn, false );
}
//------------------------------------------------------

//Layers Functions
//------------------------------------------------------
//function display layer
function showLayer(idlayer){
	//makes visible the specified layer (div)
	if (NS4) 
			document.layers[idlayer].style.display = "inline";
	 	
	else if (DOM) 
			document.getElementById(idlayer).style.display = "inline";
		
	else 
			document.all[idlayer].style.display = "inline";
}

//function hide layer
function hideLayer(idlayer){
	//hides the specified layer (div)
	if (NS4) 
			document.layers[idlayer].style.display = "none";
	 	
	else if (DOM) 
			document.getElementById(idlayer).style.display = "none";
		
	else 
			document.all[idlayer].style.display = "none";
}
//End Layers Functions
//------------------------------------------------------


//Start Ajax functions
//------------------------------------------------------
var bustcachevar=1; //bust potential caching of external pages after initial request? (1=yes, 0=no)
var bustcacheparameter="";

function ajaxpage(url, containerid) {
  var page_request = false;
  if (window.XMLHttpRequest) // if Mozilla, Safari etc
    page_request = new XMLHttpRequest();
  else if (window.ActiveXObject) { // if IE
    try {
      page_request = new ActiveXObject("Msxml2.XMLHTTP");
    } 
    catch (e) {
      try{
        page_request = new ActiveXObject("Microsoft.XMLHTTP");
      }
      catch (e){}
    }
  }
  else
    return false; 
    
  page_request.onreadystatechange=function() {
    loadpage(page_request, containerid);
  }
  
  if (bustcachevar) //if bust caching of external page
    bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime();
  
  page_request.open('GET', url+bustcacheparameter, true);
  page_request.send(null);
}

function loadpage(page_request, containerid) {
  if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
    document.getElementById(containerid).innerHTML=page_request.responseText;
}
//End Ajax functions
//------------------------------------------------------


//General javascript functions
//------------------------------------------------------
function isEmpty(vstr) {
	//first replace all spaces, tabs, enters with nothing	
	vstr=vstr.replace(/ /gi,"");	vstr=vstr.replace(/\t/gi,"");	vstr=vstr.replace(/\n/gi,"");	vstr=vstr.replace(/\r/gi,"");		
	if (vstr.length==0) return true;		//the string is empty (or filled with spaces, tabs etc)
	else return false;
}

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

function myIsIntPos(vstr) {
	//check if vstr is integer
	var reg=/^\d+$/;
	if (reg.exec(vstr) == null) return false;
	else return true;
}

function isNum(vstr) {
	if (isNaN(vstr) || vstr < 0) return false;		//vstr is not a number, or negative
	else return true;	
}

function check_date(date_field) {
	var validformat=/^\d{2}\-\d{2}\-\d{4}$/ //Basic check for format validity 
	if (!validformat.test(date_field))
		return false;			//incorect format
	else { //Detailed check for valid date ranges
		var monthfield = date_field.split("-")[1];
		var dayfield   = date_field.split("-")[0];
		var yearfield  = date_field.split("-")[2];
		
		//in Javascript months are from 0 to 11, not from 1 to 12
		var dayobj = new Date(yearfield, monthfield-1, dayfield);
		
		if ((dayobj.getMonth()+1!=monthfield)||(dayobj.getDate()!=dayfield)||(dayobj.getFullYear()!=yearfield)) 
			return false;
	}
	return true;
}


function is_future_date(date_field) {
	//check if date_field is a future date (>=current date)
	
	var monthfield = date_field.split("-")[1];
	var dayfield   = date_field.split("-")[0];
	var yearfield  = date_field.split("-")[2];
	
	//in Javascript months are from 0 to 11, not from 1 to 12
	var dayobj = new Date(yearfield, monthfield-1, dayfield);
				
	var crt_date = new Date();
	
	//set to 0  hh/mm/ss for current date to be comparable with dayobj (which has hh/mm/ss = 00/00/00)
	crt_date.setHours(0);
	crt_date.setMinutes(0);
	crt_date.setSeconds(0);
					
	var daysApart = Math.round((dayobj - crt_date)/86400000);
	
	if (daysApart>=0)
		return true;			//is a future date
	else
		return false;
}

function is_in_array(source_str, id_to_find) {
	//checks if the value @id_to_find is in array obtained from @source_str (with , as delimiter)
	var source_array = eval('['+source_str+']');
	var vb_inarray = false;
	
	for (var i=0; i<source_array.length; i++) {
		if (id_to_find==source_array[i])
			vb_inarray = true;
	}
	return vb_inarray;
}

function ismaxlength(obj) {
	var mlength=obj.getAttribute? parseInt(obj.getAttribute("maxlength")) : "";
	if (obj.getAttribute && obj.value.length>mlength)
		obj.value=obj.value.substring(0,mlength);
}
//End General javascript functions
//------------------------------------------------------


//------------------------------------------------------
//search box functions
function cleanEl(formelement) { // checks form element input value
	if(formelement.value == formelement.defaultValue) {
		formelement.value = "";
	}	
}
function checkEl(formelement) { // checks form element input value
	if(formelement.value == "") {
		formelement.value = formelement.defaultValue;
	}
}
//------------------------------------------------------


//Prices and quantities (PAWs Shop) functions
//------------------------------------------------------
function refresh_price_divs(cbo,opt_id) {
	//in product details page, when changing the option that determines the price
	var dyna_price_div;
	var opt_value;
	var element;
	var price;
	
	for (var i=0;i<cbo.options.length;i++) {
		opt_value = cbo.options[i].value;
		dyna_price_div = "div_opt_price_"+opt_value;
		element=document.getElementById(dyna_price_div);
		if (element)
			if (opt_value==opt_id) {
				element.className = "selected";
				price_sel_div="opt_price_value_"+opt_value;
				price=document.getElementById(price_sel_div).value;
			}
			else
				element.className = "simple";
	}
	
	var quant=document.frm.quantity;
	if (!myIsIntPos(quant.value))
		quant.value=1;
	var total=price*quant.value;
	document.getElementById('total_price').innerHTML = "$"+(total.toFixed(2));
	document.frm.crt_price.value=price;
	
}

function crt_prod_calc_total() {
	var price=document.frm.crt_price.value;
	var quant=document.frm.quantity;
	if (!myIsIntPos(quant.value))
		quant.value=1;
	
	var total=price*quant.value;
	
	document.getElementById('total_price').innerHTML = "$"+(total.toFixed(2));
}

function check_crt_quantity(qfield) {
	if (!myIsIntPos(qfield.value))
		qfield.value=1;
}
//End Prices and quantities (PAWs Shop) functions

function check_voucher_addcart(categ_id) {
	//check information about voucher (recipient & type)
	if (categ_id==VOUCHERS_CATID) {
		var v_field=document.frm.vch_recip_name;
		var str=v_field.value;
		if (isEmpty(str)) {alert("Voucher recipient's name is required!"); v_field.focus();return false;}
		
		var v_field_sendtype=document.frm.vch_sendtype;
		var str_sendtype=v_field_sendtype.value;
		
		var v_field_email=document.frm.vch_recip_email;
		var str_email=v_field_email.value;
		
		var v_field_addr=document.frm.vch_recip_address;
		var str_addr=v_field_addr.value;
		
		if (isEmpty(str_sendtype)) {alert("You must choose an option for sending the voucher (by mail or by post)!"); v_field_sendtype.focus();return false;}
		else if (str_sendtype=='M' && isEmpty(str_email)) {alert("Voucher recipient's email is required!"); v_field.focus();return false;}
		else if (str_sendtype=='P' && isEmpty(str_addr)) {alert("Voucher recipient's address is required!"); v_field.focus();return false;}
		
	}
	
	document.frm.submit();
}
//Form validation functions

//User Register functions
//------------------------------------------------------
function check_user_register() {
	//name required 
	var v_field=document.frm_reg.usr_name;
	var str=v_field.value;
	if (isEmpty(str)) {alert("Name is required!"); v_field.focus();return false;}
		
	//email required
	v_field=document.frm_reg.usr_email;
	str=v_field.value;
	if (isEmpty(str)) {alert("Your email address is required! You will need this to Login to PAWs Shop."); v_field.focus();return false;}
	
	//confirm email (to be equal to email)
	var v_field1=document.frm_reg.usr_email1;
	var str1=v_field1.value;
	if (isEmpty(str1) || str!=str1) {alert("The email addresses are different!"); v_field.focus();return false;}
	
	//password required & >=6 chars
	v_field=document.frm_reg.usr_password;
	str=v_field.value;
	if (isEmpty(str) || str.length<6) {alert("Your password is required and must be at least 6 characters long. You will need this to Login to PAWs Shop."); v_field.focus();return false;}
	
	//confirm password (to be equal to password)
	v_field1=document.frm_reg.usr_password1;
	str1=v_field1.value;
	if (isEmpty(str1) || str!=str1) {alert("The passwords are different!"); v_field.focus();return false;}
	
	//hint required
	v_field=document.frm_reg.usr_hint;
	str=v_field.value;
	if (isEmpty(str)) {alert("Password hint is required!"); v_field.focus();return false;}
	
	//captcha verification
	v_field=document.frm_reg.vImageCodP;
	str=v_field.value;
	if (isEmpty(str)) {alert("Please enter the Anti Spam Code!"); v_field.focus();return false;}
	
	document.frm_reg.submit();
	
}

function check_user_signin() {
	//email required
	var v_field=document.frm_sign.usr_email;
	var str=v_field.value;
	if (isEmpty(str)) {alert("Email is required!"); v_field.focus();return false;}
	
	//password required 
	v_field=document.frm_sign.usr_password;
	str=v_field.value;
	if (isEmpty(str)) {alert("Your password is required!"); v_field.focus();return false;}
	
	document.frm_sign.submit();
}

function check_user_change_details() {
	//name required 
	var v_field=document.frm_reg.usr_name;
	var str=v_field.value;
	if (isEmpty(str)) {alert("Name is required!"); v_field.focus();return false;}
	
	//email required
	v_field=document.frm_reg.usr_email;
	str=v_field.value;
	if (isEmpty(str)) {alert("Your email address is required! You will need this to Login to Pawsawhile."); v_field.focus();return false;}
	
	//confirm email (to be equal to email)
	var v_field1=document.frm_reg.usr_email1;
	var str1=v_field1.value;
	if (isEmpty(str1) || str!=str1) {alert("The email addresses are different!"); v_field.focus();return false;}

	document.frm_reg.submit();
	
}

function check_user_change_pass() {
	//old password required
	var v_field=document.frm_reg.old_password;
	var str=v_field.value;
	if (isEmpty(str)) {alert("You need to type your current password, otherwise you are not allowed to change it!"); v_field.focus();return false;}
	
	//New password required & >=6 chars
	v_field=document.frm_reg.usr_password;
	str=v_field.value;
	if (isEmpty(str) || str.length<6) {alert("Your password is required and must be at least 6 characters long. You will need this to Login to Pawsawhile."); v_field.focus();return false;}
	
	//confirm password (to be equal to password)
	v_field1=document.frm_reg.usr_password1;
	str1=v_field1.value;
	if (isEmpty(str1) || str!=str1) {alert("The passwords are different!"); v_field.focus();return false;}
	
	//hint required
	v_field=document.frm_reg.usr_hint;
	str=v_field.value;
	if (isEmpty(str)) {alert("Password hint is required!"); v_field.focus();return false;}

	document.frm_reg.submit();
	
}



function benefits_div(div_name) {
	//shows or hide info_pink_div/ info_shop_div/ info_site_div depending on link
	switch (div_name)
	{
		case 'info_pink_div':
      showLayer('info_pink_div');
      hideLayer('info_shop_div');
      hideLayer('info_site_div');
		  break;
		case 'info_shop_div':
      showLayer('info_shop_div');
      hideLayer('info_pink_div');
      hideLayer('info_site_div');
		  break;
		case 'info_site_div':
      showLayer('info_site_div');
      hideLayer('info_shop_div');
      hideLayer('info_pink_div');
		  break;
	}
}

function benefits_close_div(div_name) {
	//hides the div with info
  hideLayer(div_name);
}

//End User Register functions
//------------------------------------------------------


function check_email() {
	//email required
	v_field=document.frm_reg.usr_email;
	str=v_field.value;
	if (isEmpty(str)) {alert("Your email address is required!"); v_field.focus();return false;}
	else
		document.frm_reg.submit();
}


//Address functions
//------------------------------------------------------
function address_verification(form_name, addr_type, prefix) {
	//checks an address to be correct
	//street address is required 
	var v_field=eval('document.'+form_name+'.'+prefix+'addr_street');
	var str=v_field.value;
	if (isEmpty(str)) {alert("Street address is required!"); v_field.focus();return false;}
	
	v_field=eval('document.'+form_name+'.'+prefix+'addr_suburb');
	str=v_field.value;
	if (isEmpty(str)) {alert("Suburb / Town is required!"); v_field.focus();return false;}

	v_field=eval('document.'+form_name+'.'+prefix+'addr_country');
	var country=v_field.value;
	if (isEmpty(country)) {alert("Country is required!"); v_field.focus();return false;}

/*
	v_field=eval('document.'+form_name+'.'+prefix+'addr_state');
	str=v_field.value;
	//if country not US nor AU, check the state field
	if ((country!='Australia' && country!='United States') && isEmpty(str)) {alert("State is required!"); v_field.focus();return false;}
	
	v_field=eval('document.'+form_name+'.'+prefix+'addr_postcode');
	str=v_field.value;
	if (isEmpty(str)) {alert("Postcode is required!"); v_field.focus();return false;}
*/

	if (addr_type!='S') {	
		//if not a shipping address, the main phone is required
		v_field=eval('document.'+form_name+'.'+prefix+'addr_phone1');
		str=v_field.value;
		if (isEmpty(str)) {alert("Main phone is required!"); v_field.focus();return false;}
	}
	return true;
}

function check_address(form_name, addr_type) {
	//checks if the address (in add/edit mode) is valid
	
	if (address_verification(form_name, addr_type, ''))
		eval('document.'+form_name+'.submit();');
	else
		return false;
}

function new_cust_check_address(form_name) {
	//checks if the shipping type, Recipient's name and the address(es) are valid

	var ship_type=eval('document.'+form_name+'.ship_type');
	var vb_ship = false;
	for (var i=0;i<ship_type.length;i++) {
		if (ship_type[i].checked) {
			vb_ship = true;
			var ship_option_index = i;
		}
	}
	
	if (vb_ship==false)
		{alert("Shipping type is required!");return false;}
	
	
	var v_field=eval('document.'+form_name+'.ord_usr_name');
	var str=v_field.value;
	if (isEmpty(str)) {alert("Recipient's name is required!"); v_field.focus();return false;}
	
	v_field=eval('document.'+form_name+'.ord_giftwrap');
	str=v_field.value;
	if (isEmpty(str)) {alert("Please select your option about Gift wrapping!"); v_field.focus();return false;}
	
	if (str=='Y') {
		//he wants the purchase to be gift wrapped
		v_field=eval('document.'+form_name+'.ord_giftcard');
		str=v_field.value;
		if (isEmpty(str)) {alert("Please select your option about Gift card!"); v_field.focus();return false;}
	}
	
	if (!address_verification(form_name, 'B', ''))
		return false;
	
	if (ship_type[ship_option_index].value=='deliver') {
		if (address_verification(form_name, 'S', 'ship_'))
			eval('document.'+form_name+'.submit();');
		else
			return false;
	}
	else
		eval('document.'+form_name+'.submit();');
}

function refresh_state_div(cbo_country, form_name, prefix, cbo_state) {
	//depending on what user selects from Country combo, show/hide div with State field (Combo or textbox)
	
	if (cbo_country.value=='United States') {
		showLayer(prefix+'div_state_combo_US');
		hideLayer(prefix+'div_state_combo_AU');
		hideLayer(prefix+'div_state_text');
	}
	else if (cbo_country.value=='Australia') {
		showLayer(prefix+'div_state_combo_AU');
		hideLayer(prefix+'div_state_combo_US');
		hideLayer(prefix+'div_state_text');
	}
	else {
		showLayer(prefix+'div_state_text');
		hideLayer(prefix+'div_state_combo_US');
		hideLayer(prefix+'div_state_combo_AU');
	}
	
	var v_field = eval('document.'+form_name+'.'+prefix+cbo_state);
	v_field.value = '';
	
	if (cbo_state=='adv_state')
		if (cbo_country.value=='New Zealand')
			v_field.value = 'NZ';		//when selecting New Zealand, put state=NZ
}

//End Address functions
//------------------------------------------------------


//Card verification functions
//------------------------------------------------------
function check_ccinfo() {
	//credit card type required
	var v_field=document.frm_cc.enccc_type;
	var cctype_idx=v_field.selectedIndex;
	if (cctype_idx==0)
		{alert("Credit card type is required!");v_field.focus();return false;}
	
	//card number required
	v_field=document.frm_cc.enccc_nb;
	var str=v_field.value;
	if (isEmpty(str)) {alert("Card number is required!"); v_field.focus();return false;}
	
	//credit card verifications
	//......
	
	//expiration date required
	var v_field_m=document.frm_cc.enccc_expdate_month;
	var str_m=v_field_m.value;
	var v_field_y=document.frm_cc.enccc_expdate_year;
	var str_y=v_field_y.value;
	if (isEmpty(str_m) || isEmpty(str_y)) {alert("Expiration date is required!"); v_field_m.focus();return false;}
	//must be a valid future date
	var str='01-'+str_m+'-'+str_y;
	if ((!check_date(str)) || (!is_future_date(str))) {alert("Expiration date must be a valid future date!"); v_field_m.focus();return false;}
	
	//CCV Code required
	v_field=document.frm_cc.enccc_ccv;
	var str=v_field.value;
	if (isEmpty(str)) {alert("CCV Code is required!"); v_field.focus();return false;}
	
	//CCV a 3 or 4 digits number
	var reg=/^\d{3,4}$/;
	if (reg.exec(str) == null) {alert("CCV Code must be a three-digit or four-digit number! You find it on the back of your card."); v_field.focus();return false;}
	
	//cardholders name required 
	v_field=document.frm_cc.enccc_name;
	str=v_field.value;
	if (isEmpty(str)) {alert("Cardholders name is required!"); v_field.focus();return false;}

	document.frm_cc.submit();
}
//End Card verification functions
//------------------------------------------------------