function createCookie(name,value,days)
{
    var expires;
    if (days)
	{
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		expires = "; expires="+date.toGMTString();
	}
	else expires = "";

	document.cookie = name+"="+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 c.substring(nameEQ.length,c.length);
	}

	return null;
}

function eraseCookie(name)
{
	createCookie(name,"",-1);
}


function fetch_object(idname)
{
	if (document.getElementById)
	{
		return document.getElementById(idname);
	}
	else if (document.all)
	{
		return document.all[idname];
	}
	else if (document.layers)
	{
		return document.layers[idname];
	}
	else
	{
		return null;
	}
}


function toggle_products()
{
	var tr = fetch_object('products');
	var img = fetch_object('toggle_img');

	if (tr.style.display == '')
	{
		tr.style.display = 'none';

		createCookie('toggle', 'false', 365);
	}
	else
	{
		tr.style.display = '';

		createCookie('toggle', 'true', 365);
	}

	var image_name = img.src.split('/')
	image_name = image_name[image_name.length - 1];

	if (image_name == 'arrow_up.gif')
		img.src = '/images/arrow_down.gif';
	else
		img.src = '/images/arrow_up.gif';
}