jquery.load() returns a 404 error in Safari

$(document).ready(function(){
$('.choice_1').click(function(e) {
var url = $(this).attr('href');
$('.con_cen').load('cal_month.html');
e.preventDefault();
})

This only happens when I try to lo开发者_Python百科ad a widget from the jQuery UI. If I load a standard page then it works fine. Safari javascript console says 404. It works fine for the other major browsers. Any suggestions?

Thanks, Mike