i want retrieve data from html form to javascript file

java script file code:
USETEXTLINKS = 1

STARTALLOPEN = 0

ICONPATH = ''


foldersTree = gFld("<i>Treeview Demo</i>", "RightFrame.html")
foldersTree.treeID = "Frameset"

aux1 = insFld(foldersTree, gFld("Photos example", "demoFramesetRightFrame.html"))

aux2 = insFld(aux1, gFld("United States", "beenthere_america.gif"))
insDoc(aux2, gLnk("R", "Boston", "beenthere_boston.jpg"))
insDoc(aux2, gLnk("R", "New York", "beenthere_newyork.jpg"))
insDoc(aux2, gLnk("R", "Washington", "beenthere_washington.jpg"))

aux2 = insFld(aux1, gFld("Europe", "beenthere_europe.gif"))
insDoc(aux2, gLnk("R", "Edinburgh", "beenthere_edinburgh.gif"))
insDoc(aux2, gLnk("R", "London", "beenthere_london.jpg"))
insDoc(aux2, gLnk("R", "Munich", "beenthere_munich.jpg"))
insDoc(aux2, gLnk("R", "Athens", "beenthere_athens.jpg"))
insDoc(aux2, gLnk("R", "Florence", "beenthere_florence.jpg"))

// The next three links have their http protocol appended by the script

insDoc(aux2, gLnk("Rh", "Pisa", "beenthere_pisa.jpg"))
insDoc(aux2, gLnk("Rh", "Rome", "beenthere_rome.jpg"))
insDoc(aux2, gLnk("Rh", "Lisboa", "beenthere_lisbon.jpg"))