var num
var key
var prev
var nxt

function startMeUp(a,b,c)
{
	prev=a
	nxt=b
	nextImg=c
	
//	if(nextImg!="")					//start preloading funktion
//		loadNextImage(nextImg)
}


function getKey(e)
 {
   var key = (window.event) ? event.keyCode : e.keyCode;

	
	if(key=="39" && nxt)
	{
				location=location.href = nxt
	}
	else
	if(key=="37" && prev)
	{
			location=location.href = prev
	}
	
}
document.onkeyup = getKey;






// loadNextImage : pre-load next image
function loadNextImage(myImg)
{
if (document.images)
    {
    if (navigator.userAgent.indexOf("Opera") != -1)
        {
        nextimage = new Image();
        nextimage.src = myImg;
        }
    else if (navigator.userAgent.indexOf("MSIE") != -1 && navigator.userAgent.indexOf("Mac") != -1)
        {
        ;
        }
    else
        {
        nextimage = new Image();
        nextimage.src = myImg;
        }
    }
}