var footprint = cookieutil.getcookie(_keyfootprint);

if (footprint) {

var footprints = footprint.split('|');

var newidx;

var newfootprints = [];

var _start = footprints.length > 10 ? (footprints.length - 9) : 0;

for (newidx = 0; _start < footprints.length; _start++) {

var patt = new regexp(currbook.bookid + '_');

if (patt.test(footprints[_start])) {

//console.debug(currbook.id + '_' + ', value:' + footprints[_start]);

continue;

}

newfootprints[newidx++] = footprints[_start];

}

footprint = newfootprints.join('|');

if (footprint) {

footprint += '|';

}

} else {

footprint = '';

}

footprint += currbook.bookid;