var loadingImage;
var image = 1;
var minImage = 1;
var maxImage = 4;
function swapPic() {
	var newImage = image;
	while (newImage == image || newImage > maxImage) {
		newImage = Math.floor(Math.random() * (maxImage-minImage+2)) + minImage;
	}
	image = newImage;
	loadingImage = new Image();
	loadingImage.src = "photos/ss" + image + ".jpg";
	setTimeout("checkLoadingImage()", 1000);
}
function checkLoadingImage() {
	if (!loadingImage.complete) {
		setTimeout("checkLoadingImage()", 1000);
	} else {
		//show the image
		showNewPic();
	}
}
function showNewPic() {
	document.getElementById("pic2").src = loadingImage.src;

	var fadeDiv = document.getElementById("picswap");
	var oldPic = document.getElementById("pic1");
	fadeDiv.style.top = getYPos(oldPic) + "px";
	fadeDiv.style.left = getXPos(oldPic) + "px";
	fadeDiv.style.width = oldPic.offsetWidth + "px";
	fadeDiv.style.height = oldPic.offsetHeight + "px";
	setOpacity(fadeDiv, 0);
	fadeDiv.style.display = "block";
	fadeIn("picswap", 0);
	setTimeout("resetPic()", 3000);
}
function resetPic() {
	document.getElementById("pic1").src = loadingImage.src;
	document.getElementById("picswap").style.display = "none";
	setTimeout("swapPic()", 2000);
}
function leave() {
	document.cookie="bannerimg=" + escape(document.getElementById("pic1").src);
}
function arrive() {
	was = getCookie("bannerimg");
	if (was.length > 0)
		document.getElementById("pic1").src=was;

	setTimeout('swapPic()', 2000);
}
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 "";
}