function format_query(s_query)
	{
		s_query = s_query.replace(/^\s+|\s+$/g,'');
		s_query = s_query.replace(/[^a-z0-9--- - ]+/gi, '+');
		s_query = s_query.replace(/^\s/g, '');
		s_query = s_query.replace(/\s$/g, '');
		s_query = s_query.replace(/\s/g, '_');
		
		return s_query.toLowerCase();
	}

	function keyword_search()
	{
		// directory for keyword searches
        s_kwsearches_dir = '/' + 'tag';
		s_domain_name = 'DownloadRoute.com';
		
		// get and format search phrase
		s_query = document.getElementById('s').value;
		s_query = format_query(s_query);

		if (s_query != '' && s_query.length > 2 && s_query != 'search+string...')
		{
			// redirect browser to the keyword search page
			document.location = s_kwsearches_dir + '/' + s_query + '/';
		}
		else
		{
			// show warning
			alert(s_domain_name + " :\nPlease, enter search string first");
		}
	}