var timer;
function preloading(url)
{	
	if( url.length < 7 )
		return;
	var xhr=createXHR();   
	xhr.onreadystatechange=function()
	{ 
		if(xhr.readyState == 4)
		{
			var content = xhr.responseText;
			var i = new Image();
			i.src = content;
		} 
	}; 

	xhr.open("GET", url , true);
	xhr.send(null);
} 

function createXHR()
{
	try { return new XMLHttpRequest(); } catch(e) {}
	try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); } catch (e) {}
	try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); } catch (e) {}
	try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) {}
	try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {}
	alert("XMLHttpRequest not supported");
	return null;
}

function show_image(element,title,isLeft)
{
	clearTimeout(timer);
	element = "<table cellpadding='0' cellspacing='0' border='1'><tr><td align='center' class='thumb'>" + title + "</td></tr><tr><td><img src='" + element + "'/></td></tr></table>";
	if( isLeft )
	{
		document.getElementById("img_prev").innerHTML = element;
	}
	else
	{
		document.getElementById("img_next").innerHTML = element;
	}
}

function hide_images(t)
{
	timer = setTimeout( hide, t );
}

function hide()
{
	document.getElementById("img_next").innerHTML = "";
	document.getElementById("img_prev").innerHTML = "";
	document.getElementById("title").style.color = "white";
}

function show_title()
{
	document.getElementById("title").style.color = "#000000";
	
}

function checkMap(long)
{
	if( !long )
	{
		document.getElementById("map").style.visibility = "hidden";
	}
}