// set cookie data
function setCurrState(setting) {
document.cookie = "currState=" + escape(setting)
}
// retrieve cookie data
function getCurrState() {
var label = "currState="
var labelLen = label.length
var cLen = document.cookie.length
var i = 0
while (i < cLen) {
var j = i + labelLen
if (document.cookie.substring(i,j) == label) {
var cEnd = document.cookie.indexOf(";",j)
if (cEnd == -1) {
cEnd = document.cookie.length
}
return unescape(document.cookie.substring(j,cEnd))
} else {
i = document.cookie.indexOf(";",j)
if ( i == -1 ) {
i = document.cookie.length
}
}
}
return ""
}
// **function that updates persistent storage of state**
// toggles an outline mother entry, storing new value in the cookie
function toggle(n) {
if (n != 0) {
var newString = ""
var currState = getCurrState() // of whole outline
var expanded = currState.substring(n-1,n) // of clicked item
newString += currState.substring(0,n-1)
newString += expanded ^ 1 // Bitwise XOR clicked item
newString += currState.substring(n,currState.length)
setCurrState(newString) // write new state back to cookie
}
}
// **functions used in assembling updated outline**
// returns the proper GIF file name for each entry's control
function getGIF(n) {
var mom = db[n].mother // is entry a parent?
var expanded = getCurrState().substring(n-1,n) // of clicked item
if (!mom) {
return "daughter.gif"
} else {
if (expanded == 1) {
return "exploded.gif"
}
}
return "collapsd.gif"
}
// returns the proper status line text based on the icon style
function getGIFStatus(n) {
var mom = db[n].mother // is entry a parent
var expanded = getCurrState().substring(n-1,n) // of rolled item
if (!mom) {
return "No further items"
} else {
if (expanded == 1) {
return "Click to collapse nested items"
}
}
return "Click to expand nested items"
}
// returns padded spaces (in multiples of 3) for indenting
function pad(n) {
var result = ""
for (var i = 1; i <= n; i++) {
result += " "
}
return result
}
// initialize 'current state' storage field
if (getCurrState() == "" || getCurrState().length != db.length) {
initState = "1"
for (i = 2; i <= db.length; i++) {
initState += "0"
}
setCurrState(initState)
}
// see if user is running a Mac browser for special case handling
function isMac() {
return (navigator.userAgent.indexOf("Macintosh") >= 0) ? true :false
}
// end -->
</SCRIPT>
</HEAD>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
<!-- start
// build new outline based on the values of the cookie
// and data points in the outline data array.
// This fires each time the user clicks on a control,
// because the HREF for each one reloads the current document.
var prevIndentDisplayed = 0
var showMyDaughter = 0
document.write( "<CENTER><H3>Call Tree</H3></CENTER><HR>" )
var newOutline = "<PRE><H4>" // let padded spaces make indents
// cycle through each entry in the outline array
for (var i = 1; i <= db.length; i++) {
var theGIF = getGIF(i) // get the image
var theGIFStatus = getGIFStatus(i) // get the status message
var currIndent = db[i].indent // get the indent level
var expanded = getCurrState().substring(i-1,i) // current state
// display entry only if it meets one of three criteria
if (currIndent == 0 || currIndent <= prevIndentDisplayed || (showMyDaughter == 1 && (currIndent - prevIndentDisplayed == 1))) {
newOutline += pad(currIndent)
newOutline += "<A HREF=\"javascript:history.go(0)\" onMouseOver=\"window.parent.status=\'" + theGIFStatus + "\';return true;\" onClick=\"toggle(" + i + ")\"><IMG SRC=\"" + theGIF + "\" HEIGHT=11 WIDTH=11 BORDER=0></A>"
newOutline += " <A HREF=\"" + db[i].URL + "\" TARGET=\"bottom_target\" onMouseOver=\"window.parent.status=\'View " + db[i].display + "...\';return true;\">" + db[i].display + "</A><BR>"
prevIndentDisplayed = currIndent
showMyDaughter = expanded
}
}
newOutline += "</H4></PRE><HR>"
document.write(newOutline)
// end -->
</SCRIPT>
</BODY>
</HTML>