function getCookie(name) {
  var v = document.cookie.match('(^|;) ?' + name + '=([^;]*)(;|$)');
  return v ? v[2] : null;
}
const getQueryParams = ( params, url ) => {
			var href = url;
			// this is an expression to get query strings
            var regexp = new RegExp( '[?&]' + params + '=([^&#]*)', 'i' );
            var qString = regexp.exec(href);
            return qString ? qString[1] : null;
		};
		if(getQueryParams('partner',window.location.search) && !getCookie('partner')) {
			partner_slug=getQueryParams('partner',window.location.search);
			function loadScript(url, callback)
			{
                // adding the script element to the head as suggested before
                var head = document.getElementsByTagName('head')[0];
                var script = document.createElement('script');
                script.type = 'text/javascript';
                script.src = url;
		
			    // then bind the event to the callback function 
	            // there are several events for cross browser compatibility
                script.onreadystatechange = callback;
	            script.onload = callback;

                // fire the loading
	            head.appendChild(script);
			}
			
			loadScript('https://crm.lexly.se/chat.js?partner='+partner_slug, function(){});
		}