function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}

function to_cart(id)
{
	var price = document.getElementById('price');
	var qty = document.getElementById('qty');
	var itemprice = document.getElementById('price_'+id);
	if (!(c = readCookie('cart')))
	{
		createCookie('cart', id, 90);
		
	} else {
		createCookie('cart', c+','+id, 90);
	}
	createCookie('backpage', window.location.href, 90);
	qty.value++;
	price.value=price.value*1 + itemprice.value*1;
	window.location.href('./,cart');
	return true;	 
}