function $(id) { return document.getElementById(id); }

	function ses(a) {
		JSAN.use('OpenILS.data'); var data = new OpenILS.data(); data.init({'via':'stash'});
		switch(a) {
            case 'ws_ou' :
                return data.list.au[0].ws_ou();
            break;
			case 'authtime' :
				return data.session.authtime;
			break;
			case 'key':
			default:
				return data.session.key;
			break;
		}
	}

	function font_helper() {
		try {
			JSAN.use('OpenILS.data'); var data = new OpenILS.data(); data.init({'via':'stash'});
			removeCSSClass(document.documentElement,'ALL_FONTS_LARGER');
			removeCSSClass(document.documentElement,'ALL_FONTS_SMALLER');
			removeCSSClass(document.documentElement,'ALL_FONTS_XX_SMALL');
			removeCSSClass(document.documentElement,'ALL_FONTS_X_SMALL');
			removeCSSClass(document.documentElement,'ALL_FONTS_SMALL');
			removeCSSClass(document.documentElement,'ALL_FONTS_MEDIUM');
			removeCSSClass(document.documentElement,'ALL_FONTS_LARGE');
			removeCSSClass(document.documentElement,'ALL_FONTS_X_LARGE');
			removeCSSClass(document.documentElement,'ALL_FONTS_XX_LARGE');
			addCSSClass(document.documentElement,data.global_font_adjust);
		} catch(E) {
            var Strings = $('offlineStrings') || $('commonStrings');
			alert(Strings.getFormattedString('openils.global_util.font_size.error', [E]));
		}
	}

    function persist_helper() {
        try {
            netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
            var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces['nsIPrefBranch']);
            var nodes = document.getElementsByAttribute('oils_persist','*');
            for (var i = 0; i < nodes.length; i++) {
                var filename = location.pathname.split('/')[ location.pathname.split('/').length - 1 ];
                var base_key = 'oils_persist_' + String(location.hostname + '_' + filename + '_' + nodes[i].getAttribute('id')).replace('/','_','g') + '_';
                var attribute_list = nodes[i].getAttribute('oils_persist').split(' ');
                for (var j = 0; j < attribute_list.length; j++) {
                    var key = base_key + attribute_list[j];
                    var value = prefs.prefHasUserValue(key) ? prefs.getCharPref(key) : null;
                    dump('persist_helper: retrieving key = ' + key + ' value = ' + value + ' for ' + nodes[i].nodeName + '\n');
                    if (value) nodes[i].setAttribute( attribute_list[j], value );
                }
                if (nodes[i].nodeName == 'checkbox' && attribute_list.indexOf('checked') > -1) {
                    if (nodes[i].disabled == false && nodes[i].hidden == false) {
                        var no_poke = nodes[i].getAttribute('oils_persist_no_poke');
                        if (no_poke && no_poke == 'true') {
                            // Timing issue for some checkboxes; don't poke them with an event
                        } else {
                            var evt = document.createEvent("Events");
                            evt.initEvent( 'command', true, true );
                            nodes[i].dispatchEvent(evt);
                        }
                    }
                    nodes[i].addEventListener(
                        'command',
                        function(bk) {
                            return function(ev) {
                                try {
                                    netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
                                    var key = bk + 'checked';
                                    var value = ev.target.checked;
                                    ev.target.setAttribute( 'checked', value );
                                    prefs.setCharPref( key, value );
                                    dump('persist_helper: setting key = ' +  key + ' value = ' + value + ' for checkbox\n');
                                } catch(E) {
                                    alert('Error in persist_helper(), checkbox command event listener: ' + E);
                                }
                            };
                        }(base_key), 
                        false
                    );
                }
                // TODO: Need to add event listeners for window resizing, splitter repositioning, grippy state, etc.
            }
        } catch(E) {
            alert('Error in persist_helper(): ' + E);
        }
    }

	function getKeys(o) {
		var keys = [];
		for (var k in o) keys.push(k);
		return keys;
	}

	function get_contentWindow(frame) {
        try {
            netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
            if (frame && frame.contentWindow) {
                try {
                    if (typeof frame.contentWindow.wrappedJSObject != 'undefined') {
									 return frame.contentWindow.wrappedJSObject;
						  }
                } catch(E) {
                    var Strings = $('offlineStrings') || $('commonStrings');
                    alert(Strings.getFormattedString('openils.global_util.content_window_jsobject.error', [frame, E]));
                }
                return frame.contentWindow;
            } else {
                return null;
            }
        } catch(E) {
            var Strings = $('offlineStrings') || $('commonStrings');
            alert(Strings.getFormattedString('openils.global_util.content_window.error', [frame, E]));
        }
	}

	function update_modal_xulG(v) {
		try {
			JSAN.use('OpenILS.data'); var data = new OpenILS.data(); data.init({'via':'stash'});
			var key = location.pathname + location.search + location.hash;
			if (typeof data.modal_xulG_stack != 'undefined' && typeof data.modal_xulG_stack[key] != 'undefined') {
				data.modal_xulG_stack[key][ data.modal_xulG_stack[key].length - 1 ] = v;
				data.stash('modal_xulG_stack');
			}
		} catch(E) {
			alert('FIXME: update_modal_xulG => ' + E);
		}
	}

	function xul_param(param_name,_params) {
		/* By default, this function looks for a CGI-style query param identified by param_name.  If one isn't found, it then looks in xulG.  If one still isn't found, and _params.stash_name is true, it looks in the global xpcom stash for the field identified by stash_name.  If _params.concat is true, then it looks in all these places and concatenates the results.  There are also options for converting JSON to javascript objects, and clearing the xpcom stash_name field after retrieval.  Also added, ability to search a specific spot in the xpcom stash that implements a stack to hold xulG's for modal windows */
		try {
			//dump('xul_param('+param_name+','+js2JSON(_params)+')\n');
			var value = undefined; if (!_params) _params = {};
			if (typeof _params.no_cgi == 'undefined') {
				var cgi = new CGI();
				if (cgi.param(param_name)) {
					var x = cgi.param(param_name);
					//dump('\tfound via location.href = ' + x + '\n');
					if (typeof _params.JSON2js_if_cgi != 'undefined') {
						x = JSON2js( x );
						//dump('\tJSON2js = ' + x + '\n');
					}
					if (typeof _params.concat == 'undefined') {
						//alert(param_name + ' x = ' + x);
						return x; // value
					} else {
						if (value) {
							if (value.constructor != Array) value = [ value ];
							value = value.concat(x);
						} else {
							value = x;
						}
					}
				}
			}
			if (typeof _params.no_xulG == 'undefined') {
				if (typeof _params.modal_xulG != 'undefined') {
					JSAN.use('OpenILS.data'); var data = new OpenILS.data(); data.init({'via':'stash'});
					var key = location.pathname + location.search + location.hash;
					//dump('xul_param, considering modal key = ' + key + '\n');
					if (typeof data.modal_xulG_stack != 'undefined' && typeof data.modal_xulG_stack[key] != 'undefined') {
						xulG = data.modal_xulG_stack[key][ data.modal_xulG_stack[key].length - 1 ];
					}
				}
				if (typeof xulG == 'object' && typeof xulG[ param_name ] != 'undefined') {
					var x = xulG[ param_name ];
					//dump('\tfound via xulG = ' + x + '\n');
					if (typeof _params.JSON2js_if_xulG != 'undefined') {
						x = JSON2js( x );
						//dump('\tJSON2js = ' + x + '\n');
					}
					if (typeof _params.concat == 'undefined') {
						//alert(param_name + ' x = ' + x);
						return x; // value
					} else {
						if (value) {
							if (value.constructor != Array) value = [ value ];
							value = value.concat(x);
						} else {
							value = x;
						}
					}
				}
			}
			if (typeof _params.no_xpcom == 'undefined') {
				/* the field names used for temp variables in the global stash tend to be more unique than xuLG or CGI param names, to avoid collisions */
				if (typeof _params.stash_name != 'undefined') { 
					JSAN.use('OpenILS.data'); var data = new OpenILS.data(); data.init({'via':'stash'});
					if (typeof data[ _params.stash_name ] != 'undefined') {
						var x = data[ _params.stash_name ];
						//dump('\tfound via xpcom = ' + x + '\n');
						if (typeof _params.JSON2js_if_xpcom != 'undefined') {
							x = JSON2js( x );
							//dump('\tJSON2js = ' + x + '\n');
						}
						if (_params.clear_xpcom) { 
							data[ _params.stash_name ] = undefined; data.stash( _params.stash_name ); 
						}
						if (typeof _params.concat == 'undefined') {
							//alert(param_name + ' x = ' + x);
							return x; // value
						} else {
							if (value) {
								if (value.constructor != Array) value = [ value ];
								value = value.concat(x);
							} else {
								value = x;
							}
						}
					}
				}
			}
			//alert(param_name + ' value = ' + value);
			return value;
		} catch(E) {
			dump('xul_param error: ' + E + '\n');
		}
	}

	function get_bool(a) {
		// Normal javascript interpretation except 'f' == false, per postgres, and 'F' == false, and '0' == false (newer JSON is returning '0' instead of 0 in cases)
		// So false includes 'f', '', '0', 0, null, and undefined
		if (a == 'f') return false;
		if (a == 'F') return false;
		if (a == '0') return false;
		if (a) return true; else return false;
	}

	function get_db_true() {
		return 't';
	}

	function get_db_false() {
		return 'f';
	}

	function copy_to_clipboard(ev) {
		try {
			netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
			var text;
			if (typeof ev == 'object') {
				if (typeof ev.target != 'undefined') {
					if (typeof ev.target.textContent != 'undefined') if (ev.target.textContent) text = ev.target.textContent;
					if (typeof ev.target.value != 'undefined') if (ev.target.value) text = ev.target.value;
				}
			} else if (typeof ev == 'string') {
				text = ev;
			}
			const gClipboardHelper = Components.classes["@mozilla.org/widget/clipboardhelper;1"]
				.getService(Components.interfaces.nsIClipboardHelper);
			gClipboardHelper.copyString(text);
            var Strings = $('offlineStrings') || $('commonStrings');
                if (text.length > 20)
                        text = text.substring(0,20) + '...';

			updateStatus('statusbarRight',text + ' : copied to clipboard');
		} catch(E) {
            var Strings = $('offlineStrings') || $('commonStrings');
			alert(Strings.getFormattedString('openils.global_util.clipboard.error', [E]));	
		}
	}

	function clear_the_cache() {
		try {
			netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
			var cacheClass 		= Components.classes["@mozilla.org/network/cache-service;1"];
			var cacheService	= cacheClass.getService(Components.interfaces.nsICacheService);
			cacheService.evictEntries(Components.interfaces.nsICache.STORE_ON_DISK);
			cacheService.evictEntries(Components.interfaces.nsICache.STORE_IN_MEMORY);
		} catch(E) {
            var Strings = $('offlineStrings') || $('commonStrings');
			alert(Strings.getFormattedString('openils.global_util.clear_cache.error', [E]));
		}
	}

	function toOpenWindowByType(inType, uri) {
		var winopts = "chrome,extrachrome,menubar,resizable,scrollbars,status,toolbar";
		window.open(uri, "_blank", winopts);
	}

	function url_prefix(url) {
		if (url.match(/^\//)) url = urls.remote + url;
		if (! url.match(/^(http|chrome):\/\//) && ! url.match(/^data:/) ) url = 'http://' + url;
		dump('url_prefix = ' + url + '\n');
		return url;
	}

        function updateStatus(panel,value) {

                netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
                var mainWindow = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                   .getInterface(Components.interfaces.nsIWebNavigation)
                   .QueryInterface(Components.interfaces.nsIDocShellTreeItem)
                   .rootTreeItem
                   .QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                   .getInterface(Components.interfaces.nsIDOMWindow);

                if (!mainWindow.name.match(/^main/)){
                        mainWindow = window.opener.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                            .getInterface(Components.interfaces.nsIWebNavigation)
                            .QueryInterface(Components.interfaces.nsIDocShellTreeItem)
                            .rootTreeItem
                            .QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                            .getInterface(Components.interfaces.nsIDOMWindow);

		     if (mainWindow.document.getElementById(panel))
                        mainWindow.document.getElementById(panel).setAttribute("label",value);
                  }else{
			mainWindow.document.getElementById(panel).setAttribute("label",value);
                }

        }