function ChangeImage(first_pic, pic1)
	{
	if(document.images)
	{
		bobbyPin = new Image;
		bobbyPin.src = pic1;
		document.images[first_pic].src= bobbyPin.src;
	}
	}
	
	function ChangeBack(return_to, pic2)
    {
	if(document.images)
	{
		bobbyPin2 = new Image;
		bobbyPin2.src = pic2;
    	document.images[return_to].src= bobbyPin2.src;
	}
	}


   function roll(img_name1, img_src1)
   {
   document[img_name1].src = img_src1;
   }