bootstrap modal from code-behind and browser back,forward

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C#

ASP.NET

Javascript

bootstrap

hi
i call bootstraps modal from code-behind,my code:

Page.ClientScript.RegisterStartupScript(this.GetType(), "myScript", "initMyModal('" + timeRemain + "');", true);

in aspx page:

function initMyModal(timeRemain) {
        $(".modal-body").html(timeRemain);
        $('#myModal').one().modal('show');
}

my problem is when user click on button back in browser and then click forward the modal
displayed again.

how can perevent of display modal when users click on forward button in browser

thanks for your help