function addMyGreenSearchEngineProvider() {	
	if (window.external && ("AddSearchProvider" in window.external)) {
		var myGreenURL = document.location.toString();
		myGreenURL = myGreenURL.substring(0, myGreenURL.lastIndexOf('/')) + "/mygreensearch.xml";
		
		// Firefox 2, IE 7 and Google Chrome OpenSearch
		window.external.AddSearchProvider(myGreenURL);
	}
};

function getRandomLogo() {
	var r = Math.floor(Math.random() * 6) + 1;
	
	return [
	    '<a class="logo1" href="./index.html" title="My Green Search">',
	    	'<img src="images/logos/im' + r +'.jpg" alt="My Green Search" />',
    	'</a>'
    ].join('');
}