jQuery(document).ready(function(){

		var openUL;

		// SET OPACITY (RUN ONCE)
		jQuery("ul.sub_nav").animate({ opacity:0.9 });

		// MOUSE OVER MAIN NAV
		jQuery("li.nav_main_link").bind("mouseenter", function() {
			openUL = jQuery(this).children("ul");
			jQuery(this).addClass("on");
			jQuery("li.nav_main_link").children("ul:visible").not(openUL).hide();
			jQuery(this).children("ul").fadeIn(350);
   		});
   
		// MOUSE LEAVES MAIN NAV OR SUB_NAV(CONTAINED IN MAIN NAV)
		jQuery("li.nav_main_link").bind("mouseleave", function() { jQuery(this).children("ul:visible").hide();jQuery(this).removeClass("on"); });

	});