document.observe('dom:loaded', function() {
	// show/hide dropdown menu
	var mnu_array = new Array('mnu_games', 'mnu_science', 'mnu_lifestyle_tips');
	for (var i= 0; i < mnu_array.length; ++i) {
		var mnu_item = mnu_array[i];
		mnu_dropdown_init(mnu_item)
	};
});

function mnu_dropdown_init(mnu_element){
	$(mnu_element).observe('mouseover', function() {
		$(mnu_element).down(1).show();
	});
	$(mnu_element).observe('mouseout', function() {
		$(mnu_element).down(1).hide();
	});
} // end of mnu_dropdown_init