function ShowHideFilter(obj)
{
	if (obj.src.lastIndexOf("filter_up.gif") != -1)
	{
		obj.src = obj.src.replace("filter_up.gif", "filter_down.gif");
		document.getElementById("Filter-Center").style.display = "none";
		document.getElementById("Filter-Bottom").style.display = "none";
		createCookie("filter_" + window.location , "hidden", 365 * 24)
	}
	else
	{
		obj.src = obj.src.replace("filter_down.gif", "filter_up.gif");
		document.getElementById("Filter-Center").style.display = "block";
		document.getElementById("Filter-Bottom").style.display = "block";		
		createCookie("filter_" + window.location , "showed", 365 * 24)
	}
}


function OnInit()
{
	// Init filter
	var filter = document.getElementById("FilterPanel");
	if (filter)
	{
		var filter_state = readCookie("filter_" + window.location);
		if (filter_state != null)
		{
			if ( filter_state == "hidden")
			{
				document.getElementById("idFilterButton").src =	document.getElementById("idFilterButton").src.replace("filter_up.gif", "filter_down.gif");
				document.getElementById("Filter-Center").style.display = "none";
				document.getElementById("Filter-Bottom").style.display = "none";				
			}
		}
	}
	
	
}





window.attachEvent("onload",OnInit); 



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