var ver;

var menuitems = new Array ("nav-uvod","nav-catalogue","nav-index","nav-rules","nav-power","nav-results","nav-buy");
var menuImgOn = new Array (7);
var menuImgOff = new Array (7);


ver  = navigator.appVersion.substring(0,1);

if (ver >= 4)
{


for (i in menuitems) 
	{

menuImgOn[menuitems[i]] = new Image();
menuImgOff[menuitems[i]] = new Image();

var j = parseFloat(i)+1;
menuImgOn[menuitems[i]].src = "img/menu_cz_0"+(j)+"_on.gif";
menuImgOff[menuitems[i]].src = "img/menu_cz_0"+(j)+".gif";
	}

// rozsvit, zhasni - fce pomoci DOM prepinaji on/off status v menu
		

function rozsvit(stringId)
		 {
	  	Img = document.getElementById(stringId);
		Img.src = menuImgOn[stringId].src;
	 	 };

function zhasni(stringId)
		{
	  	Img = document.getElementById(stringId);
		Img.src = menuImgOff[stringId].src;
		};


};