Click On Jquery Ui Dialog Button Go To Bottom Of The Page

When i click to my dialog button in my page i go down to the bottom of the page, i don't know why. The modal appears in the correct site, but i'm in the bottom of the page and i ne

Solution 1:

try this.. fiddle

$(function(){ 
     var navMain = $("#nav-main");

     navMain.on("click", "a", null, function () {
         navMain.collapse('hide');
     });
 });