function vasen_on(imgName,imgName2) {
        newImage1 = "url(img/vasennavi_bg2.png)";
		newImage2 = "url(img/vasennavi_ala2.png)";
        document.getElementById(imgName).style.backgroundImage = newImage1;
		document.getElementById(imgName2).style.backgroundImage = newImage2;
}
function vasen_off(imgName,imgName2) {
        newImage1 = "url(img/vasennavi_bg.png)";
		newImage2 = "url(img/vasennavi_ala.png)";
        document.getElementById(imgName).style.backgroundImage = newImage1;
		document.getElementById(imgName2).style.backgroundImage = newImage2;
}