/**
 * These functions are kindly borrowed from regjeringen.no
 */

function setActiveStyleSheet(title, reset)
{
    //alert("doing it");
  if (!W3CDOM){return;}
    var i, a, main;
    for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
		  if (a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
            a.disabled = true;
            //console.log("title=" + a.getAttribute("title"));
            if (a.getAttribute("title") == title) {
                a.disabled = false;
                //console.log("Enablig " + a.getAttribute("title"));
            }
        }
    }
    if (reset == 1) {
        createCookie("wstyle", title, 365);
    }
}

/**
 * @param titles array of titles to search among
 * @return title of active stylesheet
 */
function getActiveStyleSheet(titles)
{
    if (!W3CDOM){return;}
    var i, a, main;
    for(i=0; (a = document.getElementsByTagName("link")[i]); i++)
    {
        if (a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {

            for(j=0;j<titles.length;j++)
            {
                if (a.getAttribute("title") == titles[j] && a.disabled == false)
                {
                    return titles[j];
                }
            }
            
        }
    }

    return "";
}

var bugRiddenCrashPronePieceOfJunk = (
    navigator.userAgent.indexOf('MSIE 5') != -1
    &&
    navigator.userAgent.indexOf('Mac') != -1
)

var W3CDOM = (!bugRiddenCrashPronePieceOfJunk &&
               document.getElementsByTagName &&
               document.createElement);


function setStyle() {

    var style = readCookie("wstyle");
    if (style != null) {
        setActiveStyleSheet(style, 1);
    }
};

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 {
        expires = "";
    }
    document.cookie = name+"="+escape(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 unescape(c.substring(nameEQ.length,c.length));
        }
    }
    return null;
};