function bildleiste(nr,datei) {
	document["bildleiste" + nr].src="portfolio/" + datei + ".jpg"; 
}


arrowleft = new Image ();
arrowleft.src =  "src/arrow_left.gif";
arrowright = new Image ();
arrowright.src =  "src/arrow_right.gif";
arrowempty = new Image ();
arrowempty.src =  "src/arrow_empty.gif";

function arrow_right_on(func) {
	if (document.images) {
		if (func == 1) {
			document["arrow_right"].src = eval("arrowright.src");
		}
		if (func == 0) {
			document["arrow_right"].src = eval("arrowempty.src");
		}
	}
}

function arrow_left_on(func) {
	if (document.images) {
		if (func == 1) {
			document["arrow_left"].src = eval("arrowleft.src");
		}
		if (func == 0) {
			document["arrow_left"].src = eval("arrowempty.src");
		}
	}
}