var testbrowser=0;
function active(imgName)
{ 

   if (testbrowser==1){      
	img1 = eval(imgName + "_on.src");
	document [imgName].src = img1;	
	}
}

function inactive(imgName)
{ 
   if (testbrowser==1){
	img1 = eval(imgName + "_off.src");
        document [imgName].src = img1;
	}
}