Refresh grid while database updating

Question

<script type="text/javascript">

var count = 0;

window.onload = function () {

setInterval(ToCallDB, 1000);

// ToCallDB();

};

function ToCallDB() {

var options = {

type: "POST",

url: "Copy of admissionstatus.aspx/retttt",

contentType: "application/json; charset=utf-8",

dataType: "json",

success: function (response) {

$('#<%= Label1.ClientID%>').text(response.d[0]);

$('#<%= Label2.ClientID%>').text(response.d[1]);

},

error: function (response) {

},

complete: function () {

}

};

$.ajax(options);

}

</script>

 

This is my ajax call for refreshing label every 1 sec. Here i do want to update the label when database has been updated.

Is it possible without  setInterval()?