space = new Image();
space.src = '/images/spacer.gif';
arrow = new Image();
arrow.src = '/images/arrow_indicator.gif';

pinned = 0;

function indicate(img, state) {
	var iimage = convertimg(img);
	if (document.images) {
		if(state == 'over' && pinned != iimage) { document[iimage].src = arrow.src }
		if(state == 'out' && pinned != iimage) { document[iimage].src = space.src }
	}
}

function pin(img) {
	
	var navlev = 0;
	var url = document.URL;
	var len = document.URL.length;
	var qmpos = document.URL.indexOf("?");
	var param = url.substring(qmpos+1, len);
	var splitparam = param.split('=');
	if(splitparam[0] == 'nl') {
		navlev = splitparam[1];
	}

	if(navlev > 0) {
		img = navlev;
	}

	if(img > 0) {
		var dimage = convertimg(img);
	
		if (document.images) {
			document[dimage].src = "/images/arrow_indicator.gif";
		}

		pinned = dimage;
	}
}

function convertimg(img) {
	var oimg = 0;
	if(isNaN(img)) { oimg = img }
	if(img == 1) { oimg = 'one' }
	if(img == 2) { oimg = 'two' }
	if(img == 3) { oimg = 'three' }
	if(img == 4) { oimg = 'four' }
	if(img == 5) { oimg = 'five' }
	if(img == 6) { oimg = 'six' }
	if(img == 7) { oimg = 'seven' }
	if(img == 8) { oimg = 'eight' }
	if(img == 9) { oimg = 'nine' }
	if(img == 10) { oimg = 'ten' }
	if(img == 11) { oimg = 'eleven' }
	if(img == 12) { oimg = 'twelve' }
	if(img == 13) { oimg = 'thirteen' }
	if(img == 14) { oimg = 'fourteen' }
	if(img == 15) { oimg = 'fifteen' }
	return oimg;
}