[jQuery] onclick event on <a href calls a function , where to return false to prevent redirection

[jQuery] onclick event on <a href calls a function , where to return false to prevent redirection


function buildingedit(searchhtmlid, filename, editid, idnum, addnum,
obj)
{
    //closeinst(searchhtmlid);
    var params = $.evalJSON('{'+editid+':'+idnum+',add:'+addnum
+',showhtml:2}');
    var myelem = document.getElementById('lastid');
    var lastid = myelem.value;
    var $tablerow = $(searchhtmlid+idnum).clone(true);
    $(searchhtmlid+lastid).css('background-color','#FFFFFF');
    if(lastid)
    {
        if(lastid!=idnum)
        {
            $.get(filename,
                        params,
                        function(returned_data)
                        {
                            var rs = $('<div id="editwindow" style="display:none;"></
div>');
                            $(searchhtmlid+idnum).hide();
                            $(searchhtmlid+idnum).after(rs);
                            //$(searchhtmlid+idnum).css('background-color','#DCE4F5');
                            $('#editwindow').css('background-color','#DCE4F5');
                            rs.html(returned_data);
                            rs.fadeIn(2000, function(){
                                    $(this).css('display','block');
                                });
                        });
            myelem.value = idnum;
            setTimeout("prepareForm("+idnum+")", 2000);
        }
        else
        {
            $('div#editwindow').fadeOut(1000, function(){
                                                                                $(this).remove();
                                                                                $(searchhtmlid+idnum).show();
                                                                                });
            myelem.value = 0;
            //closeprev(obj);
        }
    }
    else
    {
        $.get(filename,
                        params,
                        function(returned_data)
                        {
                            var rs = $('<div id="editwindow" style="display:none;"></
div>');
                            $(searchhtmlid+idnum).hide();
                            $(searchhtmlid+idnum).after(rs);
                            //$(searchhtmlid+idnum).css('background-color','#DCE4F5');
                            $('#editwindow').css('background-color','#DCE4F5');
                            rs.html(returned_data);
                            rs.fadeIn(2000, function(){
                                    $(this).css('display','block');
                                });
                        });
        myelem.value = idnum;
    }
    return false;
}
and this is called here
<a class="ToggleClose" onClick="buildingedit('#descr',
'descriptionsadd.php', 'did', <?= $did ?>, 2, this);"
href="descriptionsadd.php?add=2&did=<?= $did ?>&showhtml=2" ></a>