if (typeof jQuery === 'undefined') { 
	var e = document.createElement('script'); 
		e.src  = 'js/jquery-1.6.1.min.js'; 
		e.type = 'text/javascript'; 
	document.getElementsByTagName("head")[0].appendChild(e); 
	
	var f = document.createElement('script'); 
		f.src  = 'js/jquery-ui-1.8.14.custom.min.js'; 
		f.type = 'text/javascript'; 
	document.getElementsByTagName("head")[0].appendChild(f); 
}