How to use loading image while downloading file like csv,xls ? [SOLVED]

Hey Guys,

Please follow the below step to download using ajax request in PHP and loader show while fetching and download the file .

//Total  members Registered in a month   
jQuery('#total-members-month-report').click(function(event){  
jQuery('.overlay').show();
var buildername = $('#builder-name').val();
var date1 = jQuery('#date1').val();
var date2 = jQuery('#date2').val();   
var URL = component_path+'&task=universityreport.registeredMembers&buildername='+buildername+'&date1='+date1+'&date2='+date2;
jQuery.ajax({url: URL, success: function(result){
        setTimeout(function(){ 
  window.location.href = URL;
  jQuery('.overlay').hide();
  }, 1000);
    }});
});

Hope it will help you!!