function checkForDefaultAlertPlaceholder() {

    if ($("#alertPlaceholder").length == 0) {

        $("body > div:nth-child(2)").prepend($('<div id="alertPlaceholder"></div>'));

    }

}

bootstrap_alert = function () { }

bootstrap_alert.danger = function (message, timeout, idContainer) {

    if (idContainer == null) {

        checkForDefaultAlertPlaceholder();

    }

    var $alert = $('<div class="alert alert-danger alert-dismissable fade in" role="alertdialog"><strong>Error:</strong> ' + message + '<button type="button" class="close" data-dismiss="alert" aria-hidden="true"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button></div>');

    $("#" + (idContainer != null ? idContainer : "alertPlaceholder")).append($alert);

    if (timeout != null && timeout > 0) {

        setTimeout(function () {

            $alert.alert("close");

        }, timeout);

    }

    return $alert;

}

bootstrap_alert.warning = function (message, timeout, idContainer) {

    if (idContainer == null) {

        checkForDefaultAlertPlaceholder();

    }

    var $alert = $('<div class="alert alert-warning alert-dismissable fade in" role="alertdialog">' + message + '<button type="button" class="close" data-dismiss="alert" aria-hidden="true"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button></div>');

    $("#" + (idContainer != null ? idContainer : "alertPlaceholder")).append($alert);

    if (timeout != null && timeout > 0) {

        setTimeout(function () {

            $alert.alert("close");

        }, timeout);

    }

    return $alert;

}

bootstrap_alert.success = function (message, timeout, idContainer) {

    if (idContainer == null) {

        checkForDefaultAlertPlaceholder();

    }

    var $alert = $('<div class="alert alert-success alert-dismissable fade in" role="alertdialog"><strong>Success:</strong> ' + message + '<button type="button" class="close" data-dismiss="alert" aria-hidden="true"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button></div>');

    $("#" + (idContainer != null ? idContainer : "alertPlaceholder")).append($alert);

    if (timeout != null && timeout > 0) {

        setTimeout(function () {

            $alert.alert("close");

        }, timeout);

    }

    return $alert;

}

<div id="alertPlaceholder"></div>

 $('#').click(function(){

         $.ajax({

            type:'POST',

            url:<link>,

            data:{},

            success:function(data){
bootstrap_alert.success("The data has been saved.", 1000);

        },

            error:function(data){
bootstrap_alert.danger("Exception!This operation is not performed successfully! Please contact admin!", 1000);

            }

        });

        });