var nav = {};

nav.init = function() 
{
	nav.subnav();
	nav.loadSubnav();
}
nav.subnav = function() 
{ 
	jQuery("#global_nav li a").hover(
		function(){
			var navID = this.id;
			switch ( navID ) {	
				case "nav_hmpg":
				  jQuery(".subnav_home").show();
				  jQuery(".subnav_migraine").hide();
				  jQuery(".subnav_company").hide();
				  break;
				case "nav_migraine":
				  jQuery(".subnav_migraine").show();
				  jQuery(".subnav_home").hide();
				  jQuery(".subnav_company").hide();
				  break;
				case "nav_company":
				  jQuery(".subnav_company").show();
				  jQuery(".subnav_migraine").hide();
				  jQuery(".subnav_home").hide();
				  break;
				default:
					jQuery(".subnav_home").show();
				  break;
				}
			}
		);
}
nav.loadSubnav = function() 
{
	var bodyID = document.body.id;
	switch ( bodyID ) {	
		case "hmpg":
		  jQuery("ul.subnav_home").show();
		  break;
		case "migraine":
		  jQuery("ul.subnav_migraine").show();
		  break;
		case "company":
		  jQuery("ul.subnav_company").show();
		  break;
		default:
		
		  break;
	}
}

jQuery(document).ready( nav.init );