function changeToOn(ObjectImage,Imagesrc){
		if(Imagesrc.indexOf("_on.gif",0) < 0){
			var NewImage = Imagesrc.replace(".gif","_on.gif");
			ObjectImage.src= NewImage;
		}
	}
	function changeToOff(ObjectImage,Imagesrc){
		var NewImage = Imagesrc.replace("_on.gif",".gif");
		ObjectImage.src= NewImage;
	}