function img_act(imgName) {
			if(browser){
				imgOn = eval(imgName+"on.src");
				document[imgName].src = imgOn;
			}
		}

		function img_inact(imgName) 
		{
			if(browser){
				imgOff = eval(imgName+"off.src");
				document[imgName].src = imgOff;
			}
		}