SO Help: how to remove onclick event of anchor?

http://stackoverflow.com/questions/21912980/how-to-remove-onclick-event-of-anchor#21912980

HTML

<div id="new34"  style=" width:1028px; height:15px; background#fff; float:left;">
     <div id="previous" style="float:left; width:20px;">

<a href="#">&lt;</a>
     
     </div>
</div>

JavaScript

var pagesLeft = 3
function  getBusinesses(page){
    if(page==0){
        alert("you are already on First Page");
        $("#previous a").unbind('click')
    }
    else{
        alert(page)
        pagesLeft--
        $.ajax
        ({
            type: "POST",
            url: "getbusiness.php",
            data: "page="+page,
            success: function(msg)
            {
                $("#new2").html(msg);
                
            }
        });
    }
}

$("#previous a").click(function(e){
    e.preventDefault
    getBusinesses(pagesLeft)

})