introTrue = new Image(148,14)
introTrue.src = "buttons/introw.gif"
introFalse = new Image(148,14)
introFalse.src = "buttons/introd.gif"

teachTrue = new Image(148,18)
teachTrue.src = "buttons/teachw.gif"
teachFalse = new Image(148,18)
teachFalse.src = "buttons/teachd.gif"


astroTrue = new Image(148,16)
astroTrue.src = "buttons/astrow.gif"
astroFalse = new Image(148,16)
astroFalse.src = "buttons/astrod.gif"

teleTrue = new Image(148,16)
teleTrue.src = "buttons/telew.gif"
teleFalse = new Image(148,16)
teleFalse.src = "buttons/teled.gif"


latestTrue = new Image(148,16)
latestTrue.src = "buttons/latestw.gif"
latestFalse = new Image(148,16)
latestFalse.src = "buttons/latestd.gif"

spaceTrue = new Image(148,16)
spaceTrue.src = "buttons/spacew.gif"
spaceFalse = new Image(148,16)
spaceFalse.src = "buttons/spaced.gif"

astrophysTrue = new Image(148,16)
astrophysTrue.src = "buttons/astrophysw.gif"
astrophysFalse = new Image(148,16)
astrophysFalse.src = "buttons/astrophysd.gif"

labTrue = new Image(148,22)
labTrue.src = "buttons/labw.gif"
labFalse = new Image(148,22)
labFalse.src = "buttons/labd.gif"

physicsTrue = new Image(148,30)
physicsTrue.src = "buttons/physicsw.gif"
physicsFalse = new Image(148,30)
physicsFalse.src = "buttons/physicsd.gif"





function switchImage(imageName, mousePosition) { 
  imgToAlter = eval(imageName + mousePosition + ".src"); 
  document.images[imageName].src = imgToAlter; 
 } 
 
function multiSwitchImage(imageName, mousePosition, imageNum) { 
  imgToAlter = eval(imageName + mousePosition + imageNum + ".src"); 
  document.images[imageName].src = imgToAlter; 
}