var headBannerPath = '/forum/style/ba/hat/';
var headBanners = ['hat1.jpg','hat2.jpg','hat3.jpg','hat4.jpg','hat5.jpg','hat6.jpg','hat7.jpg','hat8.jpg','hat9.jpg','hat10.jpg','hat11.jpg','hat12.jpg','hat13.jpg','hat14.jpg','hat15.jpg','hat16.jpg','hat17.jpg','hat18.jpg','hat19.jpg','hat20.jpg','hat21.jpg','hat22.jpg','hat23.jpg','hat24.jpg','hat25.jpg','hat26.jpg','hat27.jpg','hat28.jpg'];
var headBannerIndex;
var headBannerLocked;

function setHeadBanner()
{
document.getElementById('imghead').style.backgroundImage = 'url(' + headBannerPath + headBanners[headBannerIndex] + ')';
}

function randHeadBanner()
{
headBannerIndex = Math.round((headBanners.length - 1) * Math.random());
}

function nextHeadBanner()
{
	headBannerIndex = (headBannerIndex >= headBanners.length - 1) ? 0 : headBannerIndex + 1;
	setHeadBanner();
}

function prevHeadBanner()
{
	headBannerIndex = (headBannerIndex <= 0) ? headBanners.length - 1 : headBannerIndex - 1;
	setHeadBanner();
}

function lockHeadBanner()
{
	set_cookie("bbheadbanner", headBannerIndex, new Date(new Date().getTime() + 60 * 60 * 24 * 60));
}

function unlockHeadBanner()
{
	randHeadBanner();
	setHeadBanner();
	delete_cookie("bbheadbanner");
}


headBannerIndex = fetch_cookie("bbheadbanner");
if(headBannerIndex == null) randHeadBanner();
else headBannerIndex = parseInt(headBannerIndex);

document.write('<div id="imghead" style="background-image: url(' + headBannerPath + headBanners[headBannerIndex] + ');"></div>');


function ShowHide(id) {
    obj = document.getElementsByTagName("div");
    if (obj[id].style.visibility == 'visible'){
    obj[id].style.visibility = 'hidden';
    }
    else {
    obj[id].style.visibility = 'visible';
    }
}