var popupWin = null;
function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=500,height=420,left = 390,top = 362');");
}

function aan(id) {
	nr = "knop" + id;
	img = document.images[nr].src;
	patharr = img.split("/");
	pathnum = patharr.length;
	ind = pathnum - 1;
	knarr = patharr[ind].split(".");
	knnew = Number(knarr[0]) + 10;
	newsrc = patharr[0] + "/";
	for(var i=1; i<ind; i++){
		newsrc = newsrc + patharr[i] + "/";
	}
	newsrc = newsrc + knnew + ".gif";
	//alert(newsrc);
	document.images[nr].src = newsrc;
}

function uit(id) {
	nr = "knop" + id;
	img = document.images[nr].src;
	patharr = img.split("/");
	pathnum = patharr.length;
	ind = pathnum - 1;
	knarr = patharr[ind].split(".");
	knnew = Number(knarr[0]) - 10;
	newsrc = patharr[0] + "/";
	for(var i=1; i<ind; i++){
		newsrc = newsrc + patharr[i] + "/";
	}
	newsrc = newsrc + knnew + ".gif";
	document.images[nr].src = newsrc;
}