var isMinNS4 = ( navigator.appName.indexOf( "Netscape" ) >= 0 && parseFloat( navigator.appVersion ) >= 4 ) ? 1 : 0;
var isMinNS6 = ( isMinNS4 && navigator.userAgent.indexOf( "Gecko" ) >=0 ) ? 1 : 0;
var isMinIE4 = ( document.all ) ? 1 : 0;
var isMinIE5 = ( isMinIE4==1 && navigator.appVersion.indexOf( "5." )) >= 0 ? 1 : 0;
var isMinIE6 = ( isMinIE4 && navigator.appVersion.indexOf( "6." )) >= 0 ? 1 : 0;
var isDOM = ( document.getElementById ) ? 1 : 0;


// toggles submenu display
function menuHover( a )
{
	if( isDOM == 1)
	{
		var astyle = document.getElementById( a ).style;
		if( astyle.display == "block" )
		{
			astyle.display = "none";
		}
		else
		{
			astyle.display = "block";
		}
	}
	else
	{
		if( a.style.display == "block" )
		{
			a.style.display = "none";
		}
		else
		{
			a.style.display = "block";
		}
	}
}