//KHTML engine?
var is_khtml = (navigator.vendor == 'KDE')?true:false;
//Konqueror?
var is_konq = (navigator.vendor == 'KDE')||(document.childNodes)&&(!document.all)&&(!navigator.taintEnabled)?true:false;
//KHTML or Konqueror?
var is_k = (is_khtml || is_konq);

This is a way to determine if the browser uses the KHTML engine or if it is the Konqueror Browser.

Konqueror Browser OR KHTML Engine Detection

browser

JavaScript