Knockout计算恢复旧值

Question

我有一个jQuery对话框，用户可以在页面之间切换。问题是视图模型会记住最后显示的页面 - 如果我打开对话框，导航到第2页并关闭它，如果我再次重新打开对话框，它将保留在第2页。

每次打开视图模型时如何重置视图模型？

JobActivity = function() {
    var self = this;

    // This is the array i am putting the data in  from ajax call 
    self.arraytoadd  = ko.observableArray();
    self.currentPage = ko.observable(1);
    self.perPage     = 5;

    self.pagedItems = ko.computed(function() {
        self.dummy();
        var pg    = this.currentPage(),
            start = this.perPage * (pg - 1),
            end   = start + this.perPage;

        return self.arraytoadd().slice(start, end);
    }, this);

    self.nextPage = function() {
        if (self.nextPageEnabled()) this.currentPage(this.currentPage() + 1);
    };

    self.previousPage = function() {
        if (this.previousPageEnabled()) this.currentPage(this.currentPage() - 1);
    };

    self.nextPageEnabled = ko.computed(function() {
        return this.arraytoadd().length > this.perPage * this.currentPage();
    }, this);

    self.previousPageEnabled = ko.computed(function() {
        return this.currentPage() > 1;
    }, this);
}