function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=")
  if (c_start!=-1)
    { 
    c_start=c_start + c_name.length+1 
    c_end=document.cookie.indexOf(";",c_start)
    if (c_end==-1) c_end=document.cookie.length
    return unescape(document.cookie.substring(c_start,c_end))
    } 
  }
return null
}

function setCookie(c_name,value,expiredays)
{
var exdate=new Date()
exdate.setDate(exdate.getDate()+expiredays)
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate)
}
/*
function checkCookie()
{
username=getCookie('username')
if (username!=null)
  {alert('Welcome again '+username+'!')}
else 
  {
  username=prompt('Please enter your name:',"")
  if (username!=null && username!="")
    {
    setCookie('username',username,365)
    }
  }
}
*/

function setSmoothieFlavor(flavor){
	setCookie('smoothieflavor',flavor,365);
}

function getSmoothieFlavor(){
	flavor = getCookie('smoothieflavor');
	if(flavor!=null){
		switch(flavor){
			case "banana":
				flavorImage = "booksmoothie_banana.png";
				break;
			case "blueberry":
				flavorImage = "booksmoothie_blueberry.png";
				break;
			case "cherry":
				flavorImage = "booksmoothie_cherry.png";
				break;
			case "coffee":
				flavorImage = "booksmoothie_coffee.png";
				break;
			case "frostyblue":
				flavorImage = "booksmoothie_frostyblue.png";
				break;
			case "grape":
				flavorImage = "booksmoothie_grape.png";
				break;							
			case "greenapple":
				flavorImage = "booksmoothie_greenapple.png";
				break;				
			case "orange":
				flavorImage = "booksmoothie_orange.png";
				break;										
			case "pinacolada":
				flavorImage = "booksmoothie_pinacolada.png";
				break;
			case "strawberry":
				flavorImage = "booksmoothie_strawberry.png";
				break;				
			case "watermelon":
			default:
					flavorImage="booksmoothie.png";
		}
	}else{
		flavorImage="booksmoothie.png";
	}
	
	return 'images/logo/' +flavorImage;
}