function getCookie(name) {
	var dc = document.cookie;
	var prefix = name + "=";
	var begin = dc.indexOf("; " + prefix);
	
	if (begin == -1) {
    	begin = dc.indexOf(prefix);
		if (begin != 0) return null;
	} else
    	begin += 2;

	var end = document.cookie.indexOf(";", begin);
	if (end == -1) end = dc.length;

	return unescape(dc.substring(begin + prefix.length, end));
}

// list all show/hide element IDs here
menus_array = new Array ();
menus_status_array = new Array ();// remember switches
img_close = 'rollup';
img_open = 'rolldown';
last_id = '';

/** Toggle Sheet **/
function toggleSheet(theid) {
	if(document.getElementById) {
    	var switch_id = document.getElementById(theid);
	    var imgid = theid+'Button';
    	var button_id = document.getElementById(imgid);

		// if Focused Panel changed
		// check last_id
		if(last_id != theid && last_id != '') {
			document.getElementById(last_id+'Button').className = 'rollup';
			document.getElementById(last_id).className = 'hideSwitch';
			menus_status_array[last_id] = 'hide';
			document.cookie = last_id+'=hide';
		}

		// Show Panel
	    if (menus_status_array[theid] != 'show') {
			// Show current Panel
			button_id.className = 'rolldown';
      		switch_id.className = 'showSwitch';
	  		menus_status_array[theid] = 'show';
			document.cookie = theid+'=show';
			
			// set last_id
			last_id = theid;
		}
		// Hide Panel
		else {
			button_id.className = 'rollup';
			switch_id.className = 'hideSwitch';
			menus_status_array[theid] = 'hide';
			document.cookie = theid+'=hide';
		}
	}
}

// read cookies and set navigations to last visited state
function refreshToggle() {
	if (document.getElementById) {
    	for (var i=0; i < menus_array.length; i++) {
			var idname = menus_array[i];
      		if (document.getElementById(idname)) {
				var switch_id = document.getElementById(idname);
				var imgid = idname+'Button';
				var button_id = document.getElementById(imgid);

				// alert(imgid);
				if (getCookie(idname) == 'show') {
					button_id.className = 'rolldown';
					switch_id.className = 'showSwitch';
					menus_status_array [idname] = 'show';
					
					// set last_id
					last_id = idname;
				} else {
					button_id.className = 'rollup';
					switch_id.className = 'hideSwitch';
					menus_status_array [idname] = 'hide';
				}
			}
			// else { alert("Switch '"+idname+"' is not present on this page."); }
		}
	}
}