// image lists.
var imgN = new Array()
imgN[0] = "images/btn_home_0.jpg"
imgN[1] = "images/btn_requirements_0.jpg"
imgN[2] = "images/btn_tuition_0.jpg"
imgN[3] = "images/btn_termtimes_0.jpg"
imgN[4] = "images/btn_timetable_0.jpg"
imgN[5] = "images/btn_faculty_0.jpg"
imgN[6] = "images/btn_events_0.jpg"
imgN[7] = "images/btn_news_0.jpg"
imgN[8] = "images/btn_contact_0.jpg"
var imgS = new Array()
imgS[0] = "images/btn_home_1.jpg"
imgS[1] = "images/btn_requirements_1.jpg"
imgS[2] = "images/btn_tuition_1.jpg"
imgS[3] = "images/btn_termtimes_1.jpg"
imgS[4] = "images/btn_timetable_1.jpg"
imgS[5] = "images/btn_faculty_1.jpg"
imgS[6] = "images/btn_events_1.jpg"
imgS[7] = "images/btn_news_1.jpg"
imgS[8] = "images/btn_contact_1.jpg"
// functions
function ChangeImage(image, newImageFile) {
  image.src = newImageFile
}
function PreloadImages() {
  // Create a "dummy" image.
  var preloadedImage = new Image()
  // Load all the pictures into this image, one after another.
  for (var j = 0; j < imgS.length; j++) {
    preloadedImage.src = imgS[j]
  }
}