function toggleDropDown(on ,suffix) {

	if(isIE6()) {

		if(on == 1)
			document.getElementById('subnav_' + suffix).style.display = 'block';
		else
			document.getElementById('subnav_' + suffix).style.display = 'none';
	}
}

function isIE6() {

	if (/msie/i.test(navigator.userAgent) && !/opera/i.test(navigator.userAgent)) {

		version = parseFloat(navigator.appVersion.split("MSIE")[1]);
		if (version < 7)
			return true;
	}

	return false;
}