jquery - UI effects are gone in chosen multi select box -

we use multi select box in our application using chosen jquery plugin. when click on button show select box, lists options. however, issue these options not listed in way should shown plugin.

all values listed there no text box showing enter text filter values long list. see attached screenshot. basic select box functionality seems working (like selecting multiple values , submitting) ui effects gone.

internet explorer 8 standard browser in our organization. when try on other browsers chrome/firefox, select box seems working fine without issues. stopped working in ie 8.

this has been working more year without issues , stopped working. didn’t make code changes section of application in last 1 year.

i’ve copied code below reference. i’m sure same code below working fine more year in ie 8.

$(".assignaccount,.assigncust,.assignregion").live("click", function(){     $(".modal-backdrop").show();     var modal = $("#modalbox");      $(".modalbox").animate({                 'top': '10%',                 'left': calcmodpos() + 'px'             }, 300);     $("#contentdiv").height(300);            $(".chzn-container, .chzn-drop").css('width','400px');     $("#modalbox").show();     }); 

any appreciated.

here go..

i did more research myself , found went wrong. there security patch applied on our pcs last week , disabled security settings on ie browsers. had add application url safe websites list (we never had before). once added link safe websites list in ie 8, things started working again. 400+ users in our organization experienced same issue , after link added safe websites, started working of them.