MaxCartItems = 15;
ReferrerLife = 30;

function SaveReferrer()
{
	CookieName = 'Referrer';

	CookieValue = GetCookie(CookieName);
	if(CookieValue == null)
	{
		// if no cookie present for referrer
		CookieValue = document.referrer;
	}

        var expdate = new Date();
        expdate.setDate(ReferrerLife);

        SetCookie(CookieName,CookieValue,expdate);
}

function getCookieVal (offset) {
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1)
    endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie (name) {
  var arg = name + "=";
  var alen = arg.length;
  var clen = document.cookie.length;
  var i = 0;
  while (i < clen) {
    var j = i + alen;
	   if (document.cookie.substring(i, j) == arg)
     return getCookieVal (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0) break; 
  }
  return null;
}

function SetCookie (name, value) {
  var argv = SetCookie.arguments;
  var argc = SetCookie.arguments.length;
  var expires = (argc > 2) ? argv[2] : null;
  var path = (argc > 3) ? argv[3] : null;
  var domain = (argc > 4) ? argv[4] : null;
  var secure = (argc > 5) ? argv[5] : false;
  document.cookie = name + "=" + escape (value) +
    ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
    ((path == null) ? "" : ("; path=" + path)) +
    ((domain == null) ? "" : ("; domain=" + domain)) +
    ((secure == true) ? "; secure" : "");
}

function DeleteCookie (name) {
  var exp = new Date();
  exp.setTime (exp.getTime() - 1);  // This cookie is history
  var cval = GetCookie (name);
  if (cval != null)
    document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}

function AddItem(ID,Sdesc,Price,Qty,Weight,WeightUnit)
{
	if (Qty <= 0) 
	{
		rc = alert('La cantidad tiene que ser mayor de 0');
		return false;
	}

	if (confirm('Añadir a la cesta :' +Qty+ ': "' +Sdesc+ '".')) 
	{
		for(NumItems = 0; NumItems<=MaxCartItems; NumItems++)
		{
			if(NumItems == MaxCartItems)
			{
alert('Un máximo de '+MaxCartItems+' diferentes artículos permitidos, por favor confirmar su pedido parcial y luego volver para completarlo.');
			}
			else
			{
				CookieName = 'carte' +NumItems;
				CookieValue = GetCookie(CookieName);
				if(CookieValue == null)
				{
					CookieValue = "["+ID+"À"+Sdesc+"Á"+Price+"Â"+Qty+"Ã"+Weight+"Ä"+WeightUnit+"]";
					SetCookie(CookieName,CookieValue);
					break;
				}
			}
		}
	}
	return true;
}

function FloatFormat(expr,decplaces)
{
	var str = "" + Math.round(eval(expr) * Math.pow(10,decplaces));
	while(str.length <= decplaces)
	{
		str = "0" + str;
	}

	var decpoint = str.length - decplaces;
	return str.substring(0,decpoint) + "." + str.substring(decpoint,str.length);
}

rsize = 10;		// rounding size
oz_factor = 1;		// ounces to ounces
lbs_factor = 0.0625;		// ounces to pounds
mg_factor = 28349.5;		// ounces to miligrams
g_factor = 28.3495;		// ounces to grams
kg_factor = .0283495;	// ounces to kilograms
var UnitSize;	// weight number being converted
var OldUnit;	// converting from
var NewUnit;	// converting to
var NewUnitSize;	// new weight in new unit

function ConvertUnit(UnitSize,OldUnit,NewUnit)
{
// possible units
// oz
// lbs
// mg
// g
// kg

	NewUnitSize = 0;
	TmpUnitSize = 0;

	// if not oz, convert to oz first
	if(OldUnit != 'oz')
	{
		if(OldUnit == 'lbs')
		{
			TmpUnitSize = UnitSize / lbs_factor;
		}
		else if(OldUnit == 'mg')
		{
			TmpUnitSize = UnitSize / mg_factor; 
		}
		else if(OldUnit == 'g')
		{
			TmpUnitSize = UnitSize / g_factor; 
		}
		else if(OldUnit == 'kg')
		{
			TmpUnitSize = UnitSize / kg_factor; 
		}
	}
	else
	{
		// if oz, keep as is
		TmpUnitSize = UnitSize;
	}

	// since TmpUnitSize is now oz, convert to NewUnit;
	if(NewUnit == 'oz')
	{
		NewUnitSize = TmpUnitSize;
	}
	else if(NewUnit == 'lbs')
	{
		NewUnitSize = TmpUnitSize * lbs_factor;
	}
	else if(NewUnit == 'mg')
	{
		NewUnitSize = TmpUnitSize * mg_factor;
	}	
	else if(NewUnit == 'g')
	{
		NewUnitSize = TmpUnitSize * g_factor;
	}	
	else if(NewUnit == 'kg')
	{
		NewUnitSize = TmpUnitSize * kg_factor;
	}	
}