function addToCookie(selected) {
	  var cookieData = selected.value+"_";

	  if (selected.checked) {  
		  if (cookieData != null) {
				compCookie = getCookie("card_comp");
				
				if (compCookie != "" && compCookie != null) {			
					compCookieArr = compCookie.split("_")
					if (compCookieArr.length > 5) {									
							alert("You can not compare more than 5 cards!")
					
						selected.checked = false;
						cookieData = compCookie
					} else {						
						cookieData = cookieData+compCookie
					}
					
				}				
				setCookie("card_comp", cookieData, 1);
		  }
		} else {			  			
			cookieData = removeFromCookie("card_comp", cookieData)
			setCookie("card_comp", cookieData, 1);			
		}
	 }
	 
 function removeFromCookie(cookieName, dataToRemove) {
 		compCookie = getCookie(cookieName);
		compCookie = compCookie.replace(dataToRemove, "");		 
		return compCookie	
 }

 function setCookie(cookieName, cookieData, days) {  		
    	var expires = new Date ();
		expires.setTime(expires.getTime() + days * (24 * 60 * 60 * 1000)); 
	    document.cookie = cookieName + "=" + cookieData + "; expires=" + expires.toGMTString();
 }    
 
 function getCookie(Name) {
	if(document.cookie)	{
		index = document.cookie.indexOf(Name);
		
		if (index != -1) {
			namestart = (document.cookie.indexOf("=", index) + 1);
			nameend = document.cookie.indexOf(";", index);
			if (nameend == -1) {nameend = document.cookie.length;}
			res = document.cookie.substring(namestart, nameend);
			return res;
		} else {
			return '';
		}
	}
}