<!--
function filter(imagename,objectsrc){
  if (document.images){
      document.images[imagename].src=eval(objectsrc+".src")
  }
}


a503=new Image(125,24)
a503.src="gx/dyk_instruct01.gif"
a700=new Image(125,24)
a700.src="gx/dyk_instruct02.gif"

a504=new Image(125,24)
a504.src="gx/dyk_previous01.gif"
a701=new Image(125,24)
a701.src="gx/dyk_previous02.gif"

a505=new Image(125,24)
a505.src="gx/dyk_next01.gif"
a702=new Image(125,24)
a702.src="gx/dyk_next02.gif"

a506=new Image(125,24)
a506.src="gx/dyk_over01.gif"
a703=new Image(125,24)
a703.src="gx/dyk_over02.gif"

a103=new Image(144,100)
a103.src="gx/ntd/acrocanthosaurus1.gif"
a300=new Image(144,100)
a300.src="gx/ntd/acrocanthosaurus2.gif"

a104=new Image(144,100)
a104.src="gx/ntd/allosaurus1.gif"
a301=new Image(144,100)
a301.src="gx/ntd/allosaurus2.gif"

a105=new Image(144,100)
a105.src="gx/ntd/Argentinasaurus1.gif"
a302=new Image(144,100)
a302.src="gx/ntd/Argentinasaurus2.gif"

a106=new Image(144,100)
a106.src="gx/ntd/Baryonyx1.gif"
a303=new Image(144,100)
a303.src="gx/ntd/Baryonyx2.gif"

a107=new Image(144,100)
a107.src="gx/ntd/Compsognathus1.gif"
a304=new Image(144,100)
a304.src="gx/ntd/Compsognathus2.gif"

a108=new Image(144,100)
a108.src="gx/ntd/Daspletosaurus1.gif"
a305=new Image(144,100)
a305.src="gx/ntd/Daspletosaurus2.gif"

a109=new Image(144,100)
a109.src="gx/ntd/Gallimimus1.gif"
a306=new Image(144,100)
a306.src="gx/ntd/Gallimimus2.gif"

a110=new Image(144,100)
a110.src="gx/ntd/Herrerasaurus1.gif"
a307=new Image(144,100)
a307.src="gx/ntd/Herrerasaurus2.gif"

a111=new Image(144,100)
a111.src="gx/ntd/Iguanodon1.gif"
a308=new Image(144,100)
a308.src="gx/ntd/Iguanodon2.gif"

a112=new Image(144,100)
a112.src="gx/ntd/Maiasaura1.gif"
a309=new Image(144,100)
a309.src="gx/ntd/Maiasaura2.gif"

a113=new Image(144,100)
a113.src="gx/ntd/mamenchisaurus1.gif"
a310=new Image(144,100)
a310.src="gx/ntd/mamenchisaurus2.gif"

a114=new Image(144,100)
a114.src="gx/ntd/nodosaurus1.gif"
a311=new Image(144,100)
a311.src="gx/ntd/nodosaurus2.gif"

a115=new Image(144,100)
a115.src="gx/ntd/paprsaurolophus1.gif"
a312=new Image(144,100)
a312.src="gx/ntd/paprsaurolophus2.gif"

a116=new Image(144,100)
a116.src="gx/ntd/pentaceratops1.gif"
a313=new Image(144,100)
a313.src="gx/ntd/pentaceratops2.gif"

a117=new Image(144,100)
a117.src="gx/ntd/protoceratops1.gif"
a314=new Image(144,100)
a314.src="gx/ntd/protoceratops2.gif"

a118=new Image(144,100)
a118.src="gx/ntd/psittacosaurus1.gif"
a315=new Image(144,100)
a315.src="gx/ntd/psittacosaurus2.gif"

a119=new Image(144,100)
a119.src="gx/ntd/rhoetosaurus1.gif"
a316=new Image(144,100)
a316.src="gx/ntd/rhoetosaurus2.gif"

a120=new Image(144,100)
a120.src="gx/ntd/staurikosaurus1.gif"
a317=new Image(144,100)
a317.src="gx/ntd/staurikosaurus2.gif"

a121=new Image(144,100)
a121.src="gx/ntd/Styracosaurus1.gif"
a318=new Image(144,100)
a318.src="gx/ntd/Styracosaurus2.gif"

a122=new Image(144,100)
a122.src="gx/ntd/Torosaurus1.gif"
a319=new Image(144,100)
a319.src="gx/ntd/Torosaurus2.gif"

a123=new Image(144,100)
a123.src="gx/ntd/troodon1.gif"
a320=new Image(144,100)
a320.src="gx/ntd/troodon2.gif"

a124=new Image(144,100)
a124.src="gx/ntd/ultrasauros1.gif"
a321=new Image(144,100)
a321.src="gx/ntd/ultrasauros2.gif"

a125=new Image(144,100)
a125.src="gx/ntd/utahraptor1.gif"
a322=new Image(144,100)
a322.src="gx/ntd/utahraptor2.gif"

a126=new Image(144,100)
a126.src="gx/ntd/wuerhosaurus1.gif"
a323=new Image(144,100)
a323.src="gx/ntd/wuerhosaurus2.gif"
//-->