//Hämta kaka
function readCookie(cookiename){
	if (document.cookie.length > 0) {              
    		cookiestart = document.cookie.indexOf((cookiename + "="));       
        	if (cookiestart != -1) {           
        		cookiestart += (cookiename + "=").length;       
        		cookieend = document.cookie.indexOf(";", cookiestart);
            		if (cookieend == -1) cookieend = document.cookie.length;
            			return unescape(document.cookie.substring(cookiestart, cookieend));
		} 
    	}
return null;
}


//Spara kaka
function writeCookie(cookiename, cookievalue, cookieexpires) {
	document.cookie = cookiename + "=" + escape(cookievalue) + "; path=/" +
	((cookieexpires == null) ? "" : "; expires=" + cookieexpires.toGMTString());
}

//ta bort/förstöra kaka 
function destroyCookie(cookiename) {
	document.cookie = cookiename + "=; expires=Thu, 01-Jan-70 00:00:01 GMT" +  "; path=/";
}


//Använda kaka
/*
var expdate = new Date();                                   
expdate.setTime(expdate.getTime() + (1000 * 60 * 60 * 24 * 31)); //31 dagar framåt

writeCookie("thename", "thevalue", expdate);      // Spara kaka
document.write(readCookie("thename"));      // Hämta och visa kaka
destroyCookie("thename");                      // ta bort kaka
*/