od01=new Image();
od01.src="http://www.ps-interiery.com/img/od01b.gif";
od02=new Image();
od02.src="http://www.ps-interiery.com/img/od02b.gif";
od03=new Image();
od03.src="http://www.ps-interiery.com/img/od03b.gif";
od04=new Image();
od04.src="http://www.ps-interiery.com/img/od04b.gif";

function aktiv(obr) {
document.images[obr].src='img/'+obr+'b.gif';
}

function deaktiv(obr) {
document.images[obr].src='img/'+obr+'.gif';
}

function OpenPictureWindow(theURL,winName,x,y) { //v2.0
vyska = screen.height;
sirka = screen.width;
var levy = (sirka - x)/2;
var horni = (vyska - y)/2;
window.open(theURL,winName,"width="+x+",height="+y+",left="+levy+",top="+horni);
}