// DECLARE LH MENU ARRAYS

	// group arrays with individual page names
	var index = new Array("default");
	var services = new Array("services","rental","salescomm","stringseducation","insval");
	var instbows = new Array("instbows","violins","violas","cellos","bows","mandolins","electric","special_offers_instruments");
	var contemporary_makers = new Array("contemporary_makers");
	var accessories = new Array("accessories","special_offers_accessories");
	var stringsworks = new Array("stringsworks","restorers","repairs","maintenance","instcare","techniques");
	var aboutus = new Array("aboutus","hitchin","contact","map");
	var whatsnew = new Array("whatsnew");
	var info = new Array("info","links","howtobuy","stringsart","newsletter_subscribe");
	var view_cart = new Array("view_cart");
	
	// the filename for each header link
	var menugroupsname = new Array("default", "services", "instbows", "contemporary_makers", "accessories", "stringsworks", "aboutus", "whatsnew", "info", "view_cart");

	// an array of group arrays
	var menugroups = new Array(index, services, instbows, contemporary_makers, accessories, stringsworks, aboutus, whatsnew, info, view_cart);

	// SUB-PAGE ARRAYS
	var contemporary_makers_page = new Array("contemporary_maker_details");
	var violins_page = new Array("violin_details");
	var violas_page = new Array("viola_details");
	var cellos_page = new Array("cello_details");
	var bows_page = new Array("bow_details");
	var mandolins_page = new Array("mandolin_details");
	var electric_page = new Array("electric_details");
	var accessories_page = new Array("accessories_strings_list", "accessories_cases_list", "accessories_others_list");
	var newsletter_subscribe_page = new Array("newsletter_subscribe_thanks","remove-subscriber-confirm");

	// the parent page filename
	var subpagegroupsname = new Array("contemporary_makers", "violins", "violas", "cellos", "bows", "mandolins", "electric", "accessories", "newsletter_subscribe");
	// an array of group arrays
	var subpagegroups = new Array(contemporary_makers_page, violins_page, violas_page, cellos_page, bows_page, mandolins_page, electric_page, accessories_page, newsletter_subscribe_page);

	// ensures all menu groups start off as closed
	function initializeLHMenu()   {
		var i, currentgroup = "", currentgroupindex=-1, subpageindex=-1;

		// detect page name
		thisloc=window.location.href;
		thepos=thisloc.lastIndexOf("/")+1;
		pagename=thisloc.substring(thepos);

		// get rid of any querystring
		thepos=pagename.indexOf("?");
		if (thepos>-1) pagename=pagename.substring(0, thepos);

		// get rid of file extension
		pagename=pagename.substring(0,pagename.length-4);

		// WORKING OUT WHERE THIS PAGE IS IN THE MENU

		// it could be a sub-page of a parent page (which exists in the LH menu), so work out which parent this sub-page belongs to, if any
		imatch=0;
		j=0;
		while (j<subpagegroups.length&&imatch==0)   {
			i=0;
			while (i<subpagegroups[j].length&&imatch==0)   {
				if (subpagegroups[j][i]==pagename) {  imatch=1; subpageindex = j;  }
				i++;
				}
			if (imatch==0) j++;
			}

		// if we have a match, this exists as a valid sub-page, so we need the parent page 
		if (subpageindex!=-1) pagename = subpagegroupsname[subpageindex];

		// now work out which group this page (or parent page) belongs to, if any
		imatch=0;
		j=0;
		while (j<menugroups.length&&imatch==0)   {
			i=0;
			while (i<menugroups[j].length&&imatch==0)   {
				if (menugroups[j][i]==pagename) {  imatch=1; currentgroupindex = j;  }
				i++;
				}
			if (imatch==0) j++;
			}

		// if this page is in a group
		if (currentgroupindex!=-1)   {

			currentgroup = menugroupsname[currentgroupindex];

			// now expand the group	and highlight selected item
			objcurrentgroup=document.getElementById(currentgroup+"_group");
			if (objcurrentgroup!=undefined)   {
				objcurrentgroup.style.display="block";	
				if (navigator.appVersion.indexOf("MSIE")==-1)  {
					objcurrentgroup.style.display="table-row";	
					}
				// highlight the group header cell
				document.getElementById(currentgroup).className="LHbuttonsublink";	
				}

			// now highlight the menu item relating to this page
			// ** customiseable colour
			objpage=document.getElementById(pagename);
			if (objpage.className=="LHbuttonsublinkLAST") objpage.className="LHbuttonsublinkLASTON";
			else objpage.className="LHbuttonlinkON";

			}
		}