function getScrollY() {
	var scrOfY = 0;
	if( typeof( window.pageYOffset ) == 'number' ) {
		//Netscape compliant
		scrOfY = window.pageYOffset;
	} else if( document.body && ( document.body.scrollTop ) ) {
		//DOM compliant
		scrOfY = document.body.scrollTop;
	} else if( document.documentElement && ( document.documentElement.scrollTop ) ) {
		//IE6 standards compliant mode
		scrOfY = document.documentElement.scrollTop;
	}
	return scrOfY;
}

// Highlight the menu item that the cursor is over
function mIn(obj) {
	obj.style.backgroundColor = "rgb(255, 225, 130)";
}

// Unhighlight the menu item that the cursor is over
function mOut(obj) {
	obj.style.backgroundColor = "transparent";
}

function isArray(a) {
	return isObject(a) && a.constructor == Array;
}

function isObject(a) {
	return (a && typeof a == 'object') || isFunction(a);
}

function isFunction(a) {
    return typeof a == 'function';
}