if (document.images) {

  LearnMoreOff  = new Image
  LearnMoreOver = new Image
  ProblemsOff  = new Image
  ProblemsOver = new Image

  LearnMoreOff.src  = "images/LearnMoreOff.gif"
  LearnMoreOver.src = "images/LearnMoreOver.gif"
  ProblemsOff.src  = "images/ProblemsOff.gif"
  ProblemsOver.src = "images/ProblemsOver.gif"

} else {

  LearnMoreOff = ""
  ProblemsOff = ""
  LearnMoreOver = ""
  ProblemsOver = ""
  document.LearnMore = ""
  document.Problems = ""
}