rollis_h = new Array(7);
					for(i=1; i<8; i++)
						{
						rollis_h[i] = new Image();	
						rollis_h[i].src = 'img_links/navL_' + i + '_h.gif';
						}

				rollis_n = new Array(7);
					for(i=1; i<8; i++)
						{
						rollis_n[i] = new Image();	
						rollis_n[i].src = 'img_links/navL_' + i + '_n.gif';
						}

				rollisOben_h = new Array(3);
					for(i=1; i<4; i++)
						{
						rollisOben_h[i] = new Image();	
						rollisOben_h[i].src = 'img_oben/navO_' + i + '_h.gif';
						}

				rollisOben_n = new Array(3);
					for(i=1; i<4; i++)
						{
						rollisOben_n[i] = new Image();	
						rollisOben_n[i].src = 'img_oben/navO_' + i + '_n.gif';
						}


				function rolli(imgNum,H,N,isOver)
				{
					if(isOver){
						document.images[imgNum].src = H;}
					else{
						document.images[imgNum].src = N;}
				}