function swapImage(obj)
{
	imgname = GetCookie('imgname');

	if(obj.name == "b1" && obj.name != imgname)
	{
		obj.src = "./images/menu_b1_on.gif"
	}
	else if(obj.name == "b2" && obj.name != imgname)
	{
		obj.src = "./images/menu_b2_on.gif"
	}
	else if(obj.name == "b3" && obj.name != imgname)
	{
		obj.src = "./images/menu_b3_on.gif"
	}
	else if(obj.name == "b4" && obj.name != imgname)
	{
		obj.src = "./images/menu_b4_on.gif"
	}
	else if(obj.name == "b7" && obj.name != imgname)
	{
		obj.src = "./images/menu_b7_on.gif"
	}
	else if(obj.name == "b5" && obj.name != imgname)
	{
		obj.src = "./images/menu_b5_on.gif"
	}
	else if(obj.name == "b6" && obj.name != imgname)
	{
		obj.src = "./images/menu_b6_on.gif"
	}
}

function backImage(obj)
{
	imgname = GetCookie('imgname');

	if(obj.name == "b1" && obj.name != imgname)
	{
		obj.src = "./images/menu_b1_off.gif"
	}
	else if(obj.name == "b2" && obj.name != imgname)
	{
		obj.src = "./images/menu_b2_off.gif"
	}
	else if(obj.name == "b3" && obj.name != imgname)
	{
		obj.src = "./images/menu_b3_off.gif"
	}
	else if(obj.name == "b4" && obj.name != imgname)
	{
		obj.src = "./images/menu_b4_off.gif"
	}
	else if(obj.name == "b7" && obj.name != imgname)
	{
		obj.src = "./images/menu_b7_off.gif"
	}
	else if(obj.name == "b5" && obj.name != imgname)
	{
		obj.src = "./images/menu_b5_off.gif"
	}
	else if(obj.name == "b6" && obj.name != imgname)
	{
		obj.src = "./images/menu_b6_off.gif"
	}
}
function SetCookie(name,value,hours)
{
	var expire = "";
	expire = new Date((new Date()).getTime() + hours * 3600000);
	expire = "; expires=" + expire.toGMTString();
	document.cookie = name + "=" + escape(value) + expire;
	return true;
}

function GetCookie(name)
{
	var cookieValue = "";
	var search = name + "=";
	if(document.cookie.length > 0){
		offset = document.cookie.indexOf(search);
		if (offset != -1){
			offset += search.length;
			end = document.cookie.indexOf(";", offset);
			if (end == -1) end = document.cookie.length;
			cookieValue = unescape(document.cookie.substring(offset, end))
		}
	}
	return cookieValue;
}

function saveImage(obj)
{
	SetCookie('imgname', obj.name, 1);
}

function remImage()
{
	if (imgname = GetCookie('imgname'))
	{
		document.getElementById(imgname).src = "./images/menu_" + imgname + "_on.gif";
	}
}