function showhide(res) {

		// Erstmal alles verstecken!
		box1a.style.backgroundImage="url(gfx/rightbox_off.gif)";
		box1a.style.color="#979797";						//alte Farbe: #979797"
		box1alink.style.color="#979797";						//alte Farbe: #979797"
		box1b.style.display="none";
		//box2a.style.backgroundImage="url(gfx/rightbox_off.gif)";
		//box2a.style.color="#979797";
		//box2alink.style.color="#979797";
		//box2b.style.display="none";
		box3a.style.backgroundImage="url(gfx/rightbox_off.gif)";
		box3a.style.color="#979797";
		box3alink.style.color="#979797";
		box3b.style.display="none";
		box4a.style.backgroundImage="url(gfx/rightbox_off.gif)";
		box4a.style.color="#979797";
		box4alink.style.color="#979797";
		box4b.style.display="none";
		box5a.style.backgroundImage="url(gfx/rightbox_off.gif)";
		box5a.style.color="#979797";
		box5alink.style.color="#979797";
		box5b.style.display="none";
		box6a.style.backgroundImage="url(gfx/rightbox_off.gif)";
		box6a.style.color="#979797";
		box6alink.style.color="#979797";
		box6b.style.display="none";
		box7a.style.backgroundImage="url(gfx/rightbox_off.gif)";
		box7a.style.color="#979797";
		box7alink.style.color="#979797";
		box7b.style.display="none";
		
		var box = document.getElementById(res);
			if (res == 'box1') {
			//hideall();
			box1a.style.backgroundImage="url(gfx/rightbox_on.gif)";
			box1a.style.color="#ffffff";
			box1alink.style.color="#ffffff";
			box1b.style.display="block";
			}
			if (res == 'box2') {
			//hideall();
			box2a.style.backgroundImage="url(gfx/rightbox_on.gif)";
			box2a.style.color="#ffffff";
			box2alink.style.color="#ffffff";
			box2b.style.display="block";
			}
			if (res == 'box3') {
			//hideall();
			box3a.style.backgroundImage="url(gfx/rightbox_on.gif)";
			box3a.style.color="#ffffff";
			box3alink.style.color="#ffffff";
			box3b.style.display="block";
			}
			if (res == 'box4') {
			//hideall();
			box4a.style.backgroundImage="url(gfx/rightbox_on.gif)";
			box4a.style.color="#ffffff";
			box4alink.style.color="#ffffff";
			box4b.style.display="block";
			}
			if (res == 'box5') {
			//hideall();
			box5a.style.backgroundImage="url(gfx/rightbox_on.gif)";
			box5a.style.color="#ffffff";
			box5alink.style.color="#ffffff";
			box5b.style.display="block";
			}
			if (res == 'box6') {
			//hideall();
			box6a.style.backgroundImage="url(gfx/rightbox_on.gif)";
			box6a.style.color="#ffffff";
			box6alink.style.color="#ffffff";
			box6b.style.display="block";
			}
			if (res == 'box7') {
			//hideall();
			box7a.style.backgroundImage="url(gfx/rightbox_on.gif)";
			box7a.style.color="#ffffff";
			box7alink.style.color="#ffffff";
			box7b.style.display="block";
			}
		}