var bV=parseInt(navigator.appVersion);
NS4=(document.layers) ? true : false;
IE4=((document.all)&&(bV>=4))?true:false;
ver4 = (NS4 || IE4) ? true : false;

    if (ver4) {
      firstIm = "<IMG SRC='images/home.jpg' USEMAP='#mpMenu' WIDTH=729 HEIGHT=579 BORDER=0>";
     secondIm = "<IMG SRC='images/onmit.jpg' USEMAP='#mpMenu' WIDTH=729 HEIGHT=579 BORDER=0>";
    }
    else {
      firstIm = "<IMG SRC='images/home.jpg' usemap='#mpMenu' WIDTH=729 HEIGHT=579 BORDER=0>";
     secondIm = "";
    }