var iversion = -1;
var refs = 0;
var selected = 99;

version();                                              

if (iversion >= 3) {
        names = new Array();
        on = new Array();
        off = new Array();
        texts = new Array();

        window.defaultStatus="";
	img('0', '../../gfx/navigatie/home-over.gif', '../../gfx/navigatie/home-off.gif', '');
	img('1', '../../gfx/navigatie/onzeoplossing-over.gif', '../../gfx/navigatie/onzeoplossing-off.gif', '');
	img('2', '../../gfx/navigatie/berekenonline-over.gif', '../../gfx/navigatie/berekenonline-off.gif', '');
	img('3', '../../gfx/navigatie/directafsluiten-over.gif', '../../gfx/navigatie/directafsluiten-off.gif', '');
	img('4', '../../gfx/navigatie/demoenvoorbeelden-over.gif', '../../gfx/navigatie/demoenvoorbeelden-off.gif', '');
	img('5', '../../gfx/navigatie/veelgesteldevragen-over.gif', '../../gfx/navigatie/veelgesteldevragen-off.gif', '');
}

function version() {
        if (iversion != -1) return iversion;

        if(navigator.appName.indexOf("Netscape") != -1) {
                if (navigator.userAgent.indexOf("Mozilla/2.0") != -1)
                        iversion = 2;
                else
                        if (navigator.userAgent.indexOf("Mozilla/3.0") != -1)
                                iversion = 3;
                        else
                                if (navigator.userAgent.indexOf("Mozilla/4.0") != -1)
                                        iversion = 4;
                                else
                                        iversion = 3;
        }  else {                                       // Not netscape.
                if(navigator.appName.indexOf("Internet Explorer") != -1){
                        if (navigator.userAgent.indexOf("Mozilla/4.0") != -1)
                                iversion = 4;
                        else
                                iversion = 1;
                } else
                        iversion = 1;
        }

        return iversion;
}

function img (name, onI, offI, text) {
        if (iversion >= 3) {
                names[refs] = name;
                on[refs] = new Image();
                on[refs].src = onI;
                off[refs] = new Image();
                off[refs].src = offI;
                texts[refs] = text;
		    refs++;	
        }
}

function begin(i) {
        if ( (iversion >= 3) && (selected != i)) {
                document [names[i]].src = on[i].src;
		     self.status = texts[i];
			if (selected != 99) {
                        document [names[selected]].src = off[selected].src;
                }

                selected = i;
				
        }

        return true;
}


function showOn(i) {
        if ( (iversion >= 3) && (selected != i)) {
                document [names[i]].src = on[i].src;
		     self.status = texts[i];
				
        }

        return true;
}

function showOff(i) {
        if ( (iversion >= 3) && (selected != i)) {
                document [names[i]].src = off[i].src;
			
   
        }

        return true;
}

function clicked(i) {
        if (iversion >= 3) {
                if (selected != 99) {
                        document [names[selected]].src = off[selected].src;
                }

                selected = i;
        }
}