How can I stop loading function after user is clicked too many times on link?

Jquery code looks like:

$(document).ready(function(){
$(".menu_rfr").click(function() {
$("#main").html('<img src="img/spin.gif" class="spin">');
location.replace($(this).attr('rel'));

});

$(".menu_clickable").click(function() {
$("#main").html('<img src="img/spin.gif" class="spin">');
$("#main").load($(this).attr('rel'));

});

});