A simple javascript function to get the website base url.
function getBaseUrl(){
var getUrl = window.location;
var urlArr = getUrl.pathname.split('/');
var baseUrl = getUrl.protocol + "//" + getUrl.host;
if(getUrl.host == 'localhost' || getUrl.host == '127.0.0.1' || getUrl.host == 'yourLocalHostIp'){
baseUrl += '/'+urlArr[1];
}
return baseUrl;
}