window.onerror=null;
browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
if(browserName=="Netscape" && browserVer >= 3){
 	ver = "yes";
}else{
 	ver = "yes";
}

if( ver=="yes" ) {
     a1 = new Image(); a1.src ="images/m1_on.gif";
     a2 = new Image(); a2.src ="images/m1_off.gif";
     
     b1 = new Image(); b1.src ="images/m2_on.gif";
     b2 = new Image(); b2.src ="images/m2_off.gif";
     
     c1 = new Image(); c1.src ="images/m3_on.gif";
     c2 = new Image(); c2.src ="images/m3_off.gif";
         
     }

function active(imgName){
    if (ver == "yes"){
    img1 = eval(imgName + "1.src");
    document [imgName].src = img1;
    }
}

function inactive(imgName){
     if (ver == "yes"){
	 img2 = eval(imgName + "2.src");
     document [imgName].src = img2;
     }
}