if (document.images) 
   {
      flyText = new Image
      boatText = new Image
      bgText = new Image
      heliText = new Image

      flyText.src = "../../images/fmText.gif"
      boatText.src = "../../images/boatText.gif"
      bgText.src = "../../images/bg.gif"
      heliText.src = "../../images/heliText.gif"
	  
	  flyOff = new Image
      boatOff = new Image
      heliOff = new Image
      flyOn = new Image
      boatOn = new Image
      heliOn = new Image
	  
	  flyOff.src = "../../images/flyer.gif"
      boatOff.src = "../../images/boat.gif"
      heliOff.src = "../../images/helicopter.gif"
      flyOn.src = "../../images/flyer2.gif"
      boatOn.src = "../../images/boat2.gif"
      heliOn.src = "../../images/helicopter2.gif"
   }
   
   function chgImg(imgField,newImg) 
   {
      if (document.images) 
	  {
         document[imgField].src= eval(newImg + ".src")
      }
   }