SlideToggle closes when Filter is chosen

Question

Info:

I've added a button on my homepage, which triggers a div to expand. The div shows 3 different filters, which you can choose.

The problem is:

After choosing the first filter, the div closes again. To choose the 2nd and 3rd filter, you got to press the button again to expand the div. And the problem happens again when clicking on the 2nd filter.

Question:

How can I prevent closing of my div, while choosing filters?

My code:

$(document).ready(function() {  
    if($(window).width()<768) $("#button-opl").on('click',function(){
        $("#views-exposed-form-attraktioner-block").slideToggle();  
    }); 
});