// The constructor function: creates a cookie object for the specified
// document, with a specified name and optional attributes.
// Arguments:
//   document: The Document object that the cookie is stored for. Required.
//   name:     A string that specifies a name for the cookie. Required.
//   hours:    An optional number that specifies the number of hours from now
//             that the cookie should expire.
//   path:     An optional string that specifies the cookie path attribute.
//   domain:   An optional string that specifies the cookie domain attribute.
//   secure:   An optional Boolean value that, if true, requests a secure cookie.
//
function Cookie(document, name, hours, path, domain, secure)
{
    // All the predefined properties of this object begin with '$'
    // to distinguish them from other properties which are the values to
    // be stored in the cookie.
    this.$document = document;
    this.$name = name;
    if (hours)
        this.$expiration = new Date((new Date()).getTime() + hours*3600000);
    else this.$expiration = null;
    if (path) this.$path = path; else this.$path = null;
    if (domain) this.$domain = domain; else this.$domain = null;
    if (secure) this.$secure = true; else this.$secure = false;
}

// This function is the store() method of the Cookie object.
Cookie.prototype.store = function () {
    // First, loop through the properties of the Cookie object and
    // put together the value of the cookie. Since cookies use the
    // equals sign and semicolons as separators, we'll use colons
    // and ampersands for the individual state variables we store 
    // within a single cookie value. Note that we escape the value
    // of each state variable, in case it contains punctuation or other
    // illegal characters.
    var cookieval = "";
    for(var prop in this) {
        // Ignore properties with names that begin with '$' and also methods.
        if ((prop.charAt(0) == '$') || ((typeof this[prop]) == 'function') || (this[prop]==null) ) 
            continue;
        if (cookieval != "") cookieval += '|';
        cookieval += prop + ':' + escape(this[prop]);
    }

    // Now that we have the value of the cookie, put together the 
    // complete cookie string, which includes the name and the various
    // attributes specified when the Cookie object was created.
    var cookie = this.$name + '=' + cookieval;
    if (this.$expiration)
        cookie += '; expires=' + this.$expiration.toGMTString();
    if (this.$path) cookie += '; path=' + this.$path;
    if (this.$domain) cookie += '; domain=' + this.$domain;
    if (this.$secure) cookie += '; secure';

    // Now store the cookie by setting the magic Document.cookie property.
     
    // debugging !! 
    //alert("about to store cookie\nvalue="+cookie);
    this.$document.cookie = cookie;
}

// This function is the load() method of the Cookie object.
Cookie.prototype.load = function() { 
    // First, get a list of all cookies that pertain to this document.
    // We do this by reading the magic Document.cookie property.
    var allcookies = this.$document.cookie;
    if (allcookies == "") return false;

    // Now extract just the named cookie from that list.
    var start = allcookies.indexOf(this.$name + '=');
    if (start == -1) return false;   // Cookie not defined for this page.
    start += this.$name.length + 1;  // Skip name and equals sign.
    var end = allcookies.indexOf(';', start);
    if (end == -1) end = allcookies.length;
    var cookieval = allcookies.substring(start, end);

    // Now that we've extracted the value of the named cookie, we've
    // got to break that value down into individual state variable 
    // names and values. The name/value pairs are separated from each
      // other by ampersands, and the individual names and values are
    // separated from each other by colons. We use the split method
    // to parse everything.
    var a = cookieval.split('|');    // Break it into array of name/value pairs.
    for(var i=0; i < a.length; i++)  // Break each pair into an array.
        a[i] = a[i].split(':');

    // Now that we've parsed the cookie value, set all the names and values
    // of the state variables in this Cookie object. Note that we unescape()
    // the property value, because we called escape() when we stored it.
    for(i = 0; i < a.length; i++) {
        this[a[i][0]] = unescape(a[i][1]);
    }

    // We're done, so return the success code.
    return true;
}

Cookie.prototype.length =function() {
    var idx=new Number(0);
    for(var prop in this) {
        // Ignore properties with names that begin with '$' and also methods.
        if ((prop.charAt(0) == '$') || ((typeof this[prop]) == 'function') || (this[prop]==null) ) 
            continue;
        idx+=new Number(this[prop]);
    }

    return idx;
}


// This function is the remove() method of the Cookie object.
Cookie.prototype.remove = function() {
    var cookie;
    cookie = this.$name + '=';
    if (this.$path) cookie += '; path=' + this.$path;
    if (this.$domain) cookie += '; domain=' + this.$domain;
    cookie += '; expires=Fri, 02-Jan-1970 00:00:00 GMT';

    this.$document.cookie = cookie;
}

function var_add(){
  var name;
  var data;
  	name=prompt("Enter Variable name");
	data=prompt("Enter variable data");
	
	cartdata[name]=data;
	cartdata.store();
	
	return 1;

}

// add a single note 
function cookie_add(num){

cookie_add_quantity(new String("note"+num),1);  

}

// add an item with a quantity
function cookie_add_quantity(sitem, quantity){
var snote;
var cartdata;
var sng;
var len;

cartdata = new Cookie(document, "narbeth_cart",0,"/");
cartdata.load();

 if(cartdata[sitem])      
     cartdata[sitem]=(new Number(cartdata[sitem])+new Number(quantity));
 else
     cartdata[sitem]=new Number(quantity); 

 cartdata.store(); 

 len=cartdata.length();				

 if(len==1) 
   sng="You now have one item in your cart";
 else if(len >1 ) 
  sng="You now have  a total of " + len  +" items in your cart";
    
	
 alert(sng);	

}


function cookie_del(sitem){
var cartdata;
cartdata = new Cookie(document, "narbeth_cart",0,"/");
cartdata.load();
    if(cartdata[sitem])
       cartdata[sitem]=null;  

cartdata.store();

}








function cookie_add_old(num){
var idx;
var cartdata;
var cookie=new String();
var list=new String();
var sng=new String();
var arr=new Array();

cartdata = new Cookie(document, "narbeth_cart",0,"/");
cartdata.load();
	
	cookie=cartdata.list;
	
	if(cookie != null && cookie.length > 0 ){
		arr=cookie.split(",");
		for(idx=0 ; idx <arr.length ; idx++) 
			if( arr[idx]==num ) break;
		
		if( idx != arr.length ) { 
			sng="You already have this item in your your cart\n";
			if( arr.length==1 ) sng+="You have one item in your cart";
				else 
				sng+="You have  a total of " +arr.length  +" items in your cart";
			alert(sng);
			return 0;
		}
    } 		
	// Add new number fxm: arr.push(num) doesn't work with IE5 when arr.length==0;
	arr[arr.length]=num;
	
	// Sort array
	
	
	arr.sort(function(a,b) { return a-b;  } )	
	
	cookie=arr.join(",");
				
	if(arr.length==1) 
		sng="You now have one item in your cart";
	else if(arr.length >1 ) 
		sng="You now have  a total of " +arr.length  +" items in your cart";
	
	alert(sng);	
		
	cartdata.list=cookie;
	
	cartdata.store();
	
	return 1;	
		

}



function cookie_del_old(num){
var idx;
var jdx=0;
var cartdata;
var cookie=new String();
var arr=new Array();
var arr_out= new Array();

cartdata = new Cookie(document, "narbeth_cart",0,"/");
cartdata.load();


	cookie=cartdata.list;
	
	//alert("cookie="+cookie);
	
	//num=prompt(" Enter number");
	
	if(cookie != null && cookie.length > 0 ){
		arr=cookie.split(",");
		for(idx=0 ; idx <arr.length ; idx++) 
			if( arr[idx] != num ) arr_out[jdx++]=arr[idx];
			
	}		
	
	// Sort array
	arr_out.sort(function(a,b) { return a-b;  } )	
	
	cookie=arr_out.join(",");
				
	//alert(cookie);	
	
	cartdata.list=cookie;
	
	cartdata.store();
	
	return 1;	
		

}

//for use with viewbasket.cgi only
function bart_submit(form,num){
var ret;
	
	//ret=cookie_del(num);
	alert("cookie deleted now submiting");
	//document.frmA.submit();
	//form.submit();

}