$(function(){
var randomNum = Math.floor((Math.random() * 8 ));
            var bgImg = 'url(/images/headImages/head-' + randomNum + '.jpg)';
             
        
    function randImage(){
       var loc = window.location.search.substring(1);
            if(loc){
             return false;
            }
        $('#headSection').css('background-image',bgImg);
       
        
    }
    randImage();
   
 });