Showing Logging in text while server is processing

Use the following JavaScript code.

<script type="text/javascript">
    var flag = 4;
    var anim = function () {
        if (flag == 0) {
            $("#dot1").show();
            flag++;
        }
        else if (flag == 1) {
            $("#dot2").show();
            flag++;
        } else if (flag == 2) {
            $("#dot3").show();
            flag++;
        }
        else {
            $("#dot1").hide();
            $("#dot2").hide();
            $("#dot3").hide();
            flag = 0;
        }
    };
    $("form").submit(function(e){
	$("div#contentlogin").css("opacity",".2");
$("footer").css("opacity",".2");
	$("div#loginmessage").show();              
		setInterval(anim,700);
    });

</script>