if ((navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 3) || parseInt(navigator.appVersion) >= 4) {
    rollOvers = 1;
} else {
    rollOvers = 0;
} 
var dirLevel = 1;
var levelMod = "";
levelMod = "";
for (i = 0;i < dirLevel;i++) {
levelMod += "";
} 
if (rollOvers) {

        a1On = new Image(106, 39);
   		a1On.src = levelMod + "/img/but/uslugij.gif";
		a1Off = new Image(106, 39);
   		a1Off.src = levelMod + "/img/but/uslugi.gif";
		
		a2On = new Image(106, 39);
   		a2On.src = levelMod + "/img/but/pricej.gif";
		a2Off = new Image(106, 39);
   		a2Off.src = levelMod + "/img/but/price.gif";
				
		a3On = new Image(106, 39);
   		a3On.src = levelMod + "/img/but/osnastkij-test.gif";
		a3Off = new Image(106, 39);
   		a3Off.src = levelMod + "/img/but/osnastki-test.gif";
						
		a4On = new Image(106, 39);
   		a4On.src = levelMod + "/img/but/faqj.gif";
		a4Off = new Image(106, 39);
   		a4Off.src = levelMod + "/img/but/faq.gif";
								
		a5On = new Image(106, 39);
   		a5On.src = levelMod + "/img/but/infoj.gif";
		a5Off = new Image(106, 39);
   		a5Off.src = levelMod + "/img/but/info.gif";
										
		a6On = new Image(106, 39);
   		a6On.src = levelMod + "/img/but/contj.gif";
		a6Off = new Image(106, 39);
   		a6Off.src = levelMod + "/img/but/cont.gif";		
		
		
} 
function switchOn(imgName) {
    if (rollOvers) {
imgOn = eval(imgName + "On.src");
document [imgName].src = imgOn;
    }
} 
function switchOff(imgName) {
    if (rollOvers) {
imgOff = eval(imgName + "Off.src");
document [imgName].src = imgOff;
    }
}