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\f0\fs18 \cf2 var bb_count = 0;\
var bb_curr_idx = "";\
var bb_cache = new Array;\
var bb_debug = false;\
var bb_iframe_script = "/cgi-bin/bbfix/count.cgi";\
var bb_iframe_loaded = false;\
var bb_target_div = "";\
\
//If debug is enabled via bb_init(  ), then\
//we append some data to the divTrail \
//element.\
\
function bb_debug_update (str) \{\
    if (bb_debug) \{\
        var divBBDebug = document.getElementById("divBBDebug");\
        divBBDebug.innerHTML = divBBDebug.innerHTML + "<br>" + str;\
    \}\
\}\
\
//Run from the interval timer (once a second), \
//this function reads a cache index value\
//stored in the DIV element of the child IFRAME.\
//\
//If this extracted cache index differs from the\
//current cache index, then the back button was\
//pressed. In this case, we pull the corresponding\
//data from the cache and update the page.\
\
function bb_check_state (  ) \{\
\
    if (bb_iframe_loaded == false) \{\
        return;\
    \}\
\
    var doc =  window.frames['bbFrame1'].document;\
    var new_idx = doc.getElementById('divFrameCount').innerHTML;\
\
    if (new_idx != bb_curr_idx) \{\
\
        var debug_msg = "IFRAME changed. Was " \
                        + bb_curr_idx \
                        + ", now " \
                        + new_idx;\
\
        //Pull a previous state from the cache (if it exists).\
\
        if (bb_cache[new_idx]) \{\
            var divBody = document.getElementById("divBody");\
            divBody.innerHTML = bb_cache[new_idx];\
\
            debug_msg += " [pulled " \
                         + new_idx \
                         + " from cache]";\
        \}\
        bb_curr_idx = new_idx;\
\
        bb_debug_update (debug_msg);\
    \}\
\}\
\
//Called by child IFRAME.\
\
function bb_done_loading (  ) \{\
    bb_iframe_loaded = true;\
\}\
\
//Update the hidden IFRAME.\
\
function bb_loadframe (  ) \{\
    var bbFrame1 = document.getElementById("bbFrame1");\
    bb_iframe_loaded = false;\
    bbFrame1.src = bb_iframe_script + "?" + bb_count;\
\}\
\
//When requested, save the current state\
//in a cache.\
\
function bb_save_state (  ) \{\
    //Store the new contents in the cache.\
    var div_to_cache = document.getElementById(bb_target_div);\
    bb_count++;\
    bb_cache[bb_count] = div_to_cache.innerHTML;\
\
    bb_debug_update ("Added " + bb_count + " to cache");\
\
    //Load the new page into the IFRAME.\
    bb_loadframe (  );\
\
    bb_curr_idx = bb_count;\
\}\
\
//Load the hidden IFRAME and start an interval timer.\
\
function bb_init (div_name, debug_val) \{\
    bb_target_div = div_name;\
    bb_debug = debug_val;\
\
    bb_loadframe (  );\
    window.setInterval ('bb_check_state(  )', 1000);\
    bb_save_state (  );\
\}\
}