$(function() {
	$("#div_toolbox_layer > ul > li").hover(
		function() { $(this).children(".ul_toolbox_branch").css("display", "block"); }, // Display an element's submenus on mouse over.
		function() { $(this).children(".ul_toolbox_branch").css("display", "none"); } // Hide an element's submenus on mouse out.
	);
});