current=7;
var onsrcs = new Array
                 ("bilder/navigat/prax_o.gif",
                 "bilder/navigat/team_o.gif",
                 "bilder/navigat/thera_o.gif",
				   "bilder/navigat/aktu_o.gif",
                 "bilder/navigat/kont_o.gif",
                 "bilder/navigat/imp_o.gif",
				  "bilder/navigat/gast_o.gif");

var offsrcs = new Array
                ("bilder/navigat/praxis_g.gif",
                 "bilder/navigat/team_g.gif",
                 "bilder/navigat/thera_g.gif",
				   "bilder/navigat/aktu_g.gif",
                 "bilder/navigat/kont_g.gif",
                "bilder/navigat/imp_g.gif",
				  "bilder/navigat/gast_g.gif");


var actsrcs = new Array
               ("bilder/navigat/prax_o.gif",
                 "bilder/navigat/team_o.gif",
                 "bilder/navigat/thera_o.gif",
				   "bilder/navigat/aktu_o.gif",
                 "bilder/navigat/kont_o.gif",
                "bilder/navigat/imp_o.gif",
				  "bilder/navigat/gast_o.gif");

onimages = new Array(onsrcs.length);
offimages = new Array(offsrcs.length);
actimages = new Array(actsrcs.length);
imgobjects = new Array(offsrcs.length);

function button_on (nr) {if (document.images)
                        {if (current!=nr)
                        {if (imgobjects[nr])
                        {imgobjects[nr].src = onimages[nr].src}}}}

function button_off (nr) {if (document.images)
                        {if (current!=nr)
                        {if (imgobjects[nr])
                        {imgobjects[nr].src = offimages[nr].src}}}}

function button_act(nr) {if (document.images)
                        {if (imgobjects[current])
                        {imgobjects[current].src = offimages[current].src}
                        if (imgobjects[nr])
                        {imgobjects[nr].src = actimages[nr].src}
                        current=nr;}}

function LoadImages () {if (document.images)
                        {for (x=0; x< onimages.length; x++)
                        {onimages[x] = new Image();
                            onimages[x].src = onsrcs[x];}
                               for (x=0; x< offimages.length; x++)
                        {offimages[x] = new Image();
                          offimages[x].src = offsrcs[x];}
                               for (x=0; x< actimages.length; x++)
                        {actimages[x] = new Image();
                          actimages[x].src = actsrcs[x];}}}

function LoadObjects () {if (document.images)
                        {imgobjects[0] = document.praxis;
                         imgobjects[1] = document.team;
                         imgobjects[2] = document.thera;
						 imgobjects[3] = document.aktu;
                         imgobjects[4] = document.kontakt;
                         imgobjects[5] = document.imp;
						    imgobjects[6] = document.gast;}}