Something with Tooltips using Bootstrap

Something with Tooltips using Bootstrap

well this is for the people that know about Jquery more about me and this
is my question:
I'm using bootstrap framework to create my web I've added some tooltips to
try these But i've noticed that the code that i'm using doesn't work for 2
or more tooltips
I mean, this is the code of the JS:
<script>
$(function () {
$('#tooltips').tooltip();
});
</script>
And this is the code to call the tooltip:
<a href='#' id='tooltips' data-placement='top' title='this is a tooltip'>
I was sure if i place that code i'll able to use it for 2 or more
tooltips, but i can't.
To resume: I want to know why i can't use it for 2 or more tooltips
instead of one, cause i don't want to had like 10 lines of JS for 4
tooltips