var uapattern = /Mozilla.*(?:Firefox|Minefield|GranParadiso|BonEcho|Iceweasel)\/([^\s]*).*$/;
var ua = navigator.userAgent;
var uamatch = uapattern.exec(ua);
var engineURL = 'http://www.speckly.com/plugin/engine.xml';

function addEngine() { 
    if (window.external && ("AddSearchProvider" in window.external)) {
        window.external.AddSearchProvider(engineURL);
        return false;
    } else { 	 
        alert("Your browser version doesn't supprot this engine plugin");
        return true;
    } 	 
}