var MAC 	= (navigator.platform.toLowerCase().indexOf("mac") != -1);
	var IE 		= document.all ? true : false;
	var SAFARI 	= (navigator.userAgent.toLowerCase().indexOf("safari") != -1);
	var SP2 	= IE && (window.navigator.appMinorVersion.indexOf("SP2") != -1);
	var IS_ACTIVEX_INSTALLED = (window.activex_is_installed) ? activex_is_installed() : false;
	
	var TOUR_WINDOW_WIDTH 			= 560;
	var TOUR_WINDOW_HEIGHT 			= 550;
	
	var CONTACT_WINDOW_WIDTH 		= 394;
	var CONTACT_WINDOW_HEIGHT 		= 620;
	
	var KONFABULATOR_WINDOW_WIDTH 	= 800;
	var KONFABULATOR_WINDOW_HEIGHT 	= screen.availHeight - 30;
	
	var ADSYS_WINDOW_WIDTH 		= 900;
	var ADSYS_WINDOW_HEIGHT 	= screen.availHeight - 30;
	
	var BRIDGE_TOP_OFFSET			= IE ? 51 : (SAFARI ? 50 : 52);
	var SCREEN_OFFSET				= IE ? 10 : 0;
	var RESIZE_CLIENT_HEIGHT_LIMIT 	= IE ? 500 : 500;
	var can_toggle 					= false;
	
	var expandable_menus = new Array(4);
	expandable_menus[0] = "sub_help";
	expandable_menus[1] = "sub_downloads";
	expandable_menus[2] = "sub_about";
	expandable_menus[3] = "sub_adsys";
	
	var expanded_menus = new Array;
	expanded_menus["sub_help"] 		= false;
	expanded_menus["sub_downloads"] = false;
	expanded_menus["sub_about"] 	= false;
	expanded_menus["sub_adsys"] 	= false;
	
	var content_files = new Array;

	
	
	function exists()
	{
		return true;
	}
	/*************************************************************************/
	// AJAX
	var ajax;
	function ajax_init() 
	{
		ajax = false;
		if(window.XMLHttpRequest) 
		{
			try 	 { ajax = new XMLHttpRequest();	} 
			catch(e) { ajax = false;			    }
		} 
		else if(window.ActiveXObject) 
		{
			try 	 {	ajax = new ActiveXObject("Msxml2.XMLHTTP");	} 
			catch(e) 
			{	
				try 	 { ajax = new ActiveXObject("Microsoft.XMLHTTP");	} 
				catch(e) { ajax = false;									}
			}
		}
		if(ajax) 
		{
			ajax.onreadystatechange = ajax_receive;
		}
	}
	function ajax_send(url)
	{
		ajax_init();
		if(!ajax) alert("Ajax failed to initialize");
		if (url.indexOf('?') == -1)
		  url = url + '?no_session_event=1';
		else
		  url = url + '&no_session_event=1';
		ajax.open("GET", url, true);
		ajax.send("");
	}	
	function ajax_receive()
	{
		if (ajax.readyState == 4) 
			if (ajax.status == 200) 
			{
            	get_object("preview").innerHTML = ajax.responseText;
            	if (location.hash != '#' && location.hash != '')
              	location.hash = location.hash;
				
				get_object("preview").style.top = "0";
        	}
			else alert("There was a problem retrieving the XML data:\n" + ajax.statusText);	
    }
 	/*************************************************************************/
	function get_object(id)
	{
		if(IE) return document.all[id];
		else   return document.getElementById(id);
	}
	function toggle_menu(id)
	{
		if(expanded_menus[id]) collapse_menu(id);
		else
		{
			collapse_all();
			expand_menu(id);
		}
	}
	function expand_menu(id)
	{
		get_object(id).className = "present";
		get_object(id+"_btn").src = "http://i.snap.com/images/icon_minus.gif";
		expanded_menus[id] = true;
	}
	function collapse_menu(id)
	{
		get_object(id).className = "absent";
		get_object(id+"_btn").src = "http://i.snap.com/images/icon_plus.gif";
		expanded_menus[id] = false;
	}
	function collapse_all()
	{
		for(i=0; i<expandable_menus.length; i++)
		{
			var id = expandable_menus[i];
			if(expanded_menus[id])	collapse_menu(id);
		}
	}	
	function load_content(num)
	{
		ajax_send(content_files[num]);
	}
	function addEngine(name,ext,cat) 
	{
		if ((typeof window.sidebar == "object") && (typeof window.sidebar.addSearchEngine == "function")) 
		{
			window.sidebar.addSearchEngine(
				SERVER + "/about/"+name+".src",
				SERVER + "/about/"+name+"."+ext,
				name,
				cat );
			top.location = "/about/browser_plugin_ff_complete.php";
		}		
	}
	function start_tour()
	{
		if(typeof ABOUT_INDEX != "undefined") open_menu(111); 
		else top.location = "/about/index.php?page_id=111";
		// switching to inline tour
		/*var tour_win = window.open("/tour/tour1.php","tour_window",
					"top=0,left=" + (screen.availWidth - TOUR_WINDOW_WIDTH - SCREEN_OFFSET) + ",width=" + TOUR_WINDOW_WIDTH +
					",height="+TOUR_WINDOW_HEIGHT+"status=no,address=no,toolbar=no,scroll=no");
		tour_win.focus();*/
	}
	
	function open_overview()
	{
		var overview = window.open("/about/overview.php","overview","");
		overview.focus();
	}
	function open_contact_us()
	{
		var contact_win = window.open("/about/contact.php","contact_us","width=" + CONTACT_WINDOW_WIDTH + 
					",height=" + CONTACT_WINDOW_HEIGHT + ",top=1,left=" + 
					(screen.availWidth - CONTACT_WINDOW_WIDTH - SCREEN_OFFSET) + ",scrollbars=no,resizable=no");
		contact_win.focus();
	}
	function open_feedback()
		{
			var feedback_win = window.open("/about/feedbk.php","Send_Feedback","width=" + FEEDBACK_WINDOW_WIDTH + 
						",height=" + FEEDBACK_WINDOW_HEIGHT + ",top=1,left=" + 
						(screen.availWidth - FEEDBACK_WINDOW_WIDTH - SCREEN_OFFSET) + ",scrollbars=no,resizable=no");
			feedback_win.focus();
	}
	function open_konfabulator_download()
	{
		var konf_win = window.open("http://widgets.yahoo.com/gallery/view.php?widget=37340","konfabulator","width=" + 
					KONFABULATOR_WINDOW_WIDTH + ",height=" + KONFABULATOR_WINDOW_HEIGHT + ",top=1,left=" + 
					(screen.availWidth - KONFABULATOR_WINDOW_WIDTH - SCREEN_OFFSET) + ",scrollbars=yes,resizable=yes");
		konf_win.focus();
	}
	function open_adsys_faq()
	{
		var adsys_win = window.open("https://adsys.snap.com/general_help.php","adsys","width=" + 
					ADSYS_WINDOW_WIDTH + ",height=" + ADSYS_WINDOW_HEIGHT + ",top=1,left=" + 
					(screen.availWidth - ADSYS_WINDOW_WIDTH - SCREEN_OFFSET) + ",scrollbars=yes,resizable=yes");
		adsys_win.focus();
	}
	function open_adsys_login(form)
	{
		var login_pair = "email_address=" + form.email_address.value + "&password=" + form.password.value;
		var adsys_win = window.open("https://adsys.snap.com/login.php?action=process&"+login_pair,"adsys","width=" + 
					ADSYS_WINDOW_WIDTH + ",height=" + ADSYS_WINDOW_HEIGHT + ",top=1,left=" + 
					(screen.availWidth - ADSYS_WINDOW_WIDTH - SCREEN_OFFSET) + ",scrollbars=yes,resizable=yes");
		adsys_win.focus();
		return false;
	}
	function open_adsys_signup()
	{
		var adsys_win = window.open("https://adsys.snap.com/create_account.php","adsys","width=" + 
					ADSYS_WINDOW_WIDTH + ",height=" + ADSYS_WINDOW_HEIGHT + ",top=1,left=" + 
					(screen.availWidth - ADSYS_WINDOW_WIDTH - SCREEN_OFFSET) + ",scrollbars=yes,toolbar=yes,status=yes,menubar=yes,location=yes");
		adsys_win.focus();
	}
	function open_adsys_forgot_password()
	{
		var adsys_win = window.open("https://adsys.snap.com/password_forgotten.php","adsys","width=" + 
					ADSYS_WINDOW_WIDTH + ",height=" + ADSYS_WINDOW_HEIGHT + ",top=1,left=" + 
					(screen.availWidth - ADSYS_WINDOW_WIDTH - SCREEN_OFFSET) + ",scrollbars=yes,resizable=yes");
		adsys_win.focus();
	}
	function resize_page()
	{
		var client_height = document.body.clientHeight;
		var client_width  = document.body.clientWidth;
		if(client_height < RESIZE_CLIENT_HEIGHT_LIMIT) client_height = RESIZE_CLIENT_HEIGHT_LIMIT;
		if(IE)
		{
			var client_height = document.body.offsetHeight;
			get_object("preview").style.height 	= client_height - 94;
			get_object("abnav").style.height 	= client_height - 94;
		}
		else
		{
			get_object("preview").style.height 	= client_height - 130;
			get_object("abnav").style.height 	= client_height - 90;
			get_object("rightWell").style.width 	= "98%"
		}
	}
	function reset_scroll(id)
	{
		get_object(id).scrollTop = 0;
	}
	function reset_preview()
	{
		reset_scroll("preview");
	}
	function swap_hot_img()
	{
		var img = get_object('hot_td').getElementsByTagName("img")[0];
		if(typeof img != "undefined")
		{
			if( img.src.indexOf("icon_minus.gif") != -1 )
				img.src = "http://i.snap.com/images/icon_plus.gif";
			else img.src = "http://i.snap.com/images/icon_minus.gif";
		}			
	}
	function move_bridge(container,is_submenu,expandable_menu_id,dont_move)
	{
		var left_td_width = 269;
		var margin_left = 25;
		var onclick 	= "";
					
		if(is_submenu) 	margin_left = 42;		
		if(expandable_menu_id && can_toggle) onclick = "toggle_menu(\"" + expandable_menu_id + "\");swap_hot_img();";
		
		if(!dont_move)	get_object('hot').style.top = container.offsetTop + BRIDGE_TOP_OFFSET;
		get_object('hot').innerHTML = 
		
		"<div onclick='" + onclick + "' " + 
			"style='width:100%; margin: 7px 0px 8px " + 
			margin_left + "px; font-size: 12px; color: #333333;'>" + 				
			"<table cellpadding='0' cellspacing='0'><tr>" +
			"<td width='" + (left_td_width - margin_left) + "'>" + container.getElementsByTagName("a")[0].firstChild.nodeValue + "</td>" + 
			"<td id='hot_td' style='font-size:13px;'>" + container.getElementsByTagName("span")[0].innerHTML + "</td>" + 
			"</tr></table>" +				
		"</div>";
		
		var img = get_object('hot_td').getElementsByTagName("img")[0];

		if(!SAFARI && typeof img != "undefined") img.id = "hot_img";
	}

	function open_menu(page_id)
	{
		var is_submenu 			= true;
		var expandable_menu_id 	= null;
		var menu_id 			= "menu" + page_id;
		
		switch(page_id)
		{
			case 1: case 7: case 21: case 22:
				is_submenu 			= false;
				break;
			case 2: case 3: 
				is_submenu 			= false;
				expandable_menu_id 	= 'sub_help';
				can_toggle 			= true;
				break;
			case 8:
				is_submenu 			= false;
				expandable_menu_id 	= 'sub_downloads';
				can_toggle 			= true;
				break;
			case 28:
				is_submenu 			= false;
				expandable_menu_id 	= 'sub_adsys';
				can_toggle 			= true;
				break;
			case 13:
				is_submenu 			= false;
				expandable_menu_id 	= 'sub_about';
				can_toggle 			= true;
				break;
			case 4: case 5: case 6: case 4009:
				expandable_menu_id 	= 'sub_help';
				can_toggle 			= false;
				break;
			case 9: case 10: case 11: case 12: case 120:
				expandable_menu_id 	= 'sub_downloads';
				can_toggle 			= false;
				break;
			case 29: case 30: case 31: case 32:
				expandable_menu_id 	= 'sub_adsys';
				can_toggle 			= false;
				break;
			case 1013: case 14: case 15: case 16: case 17: case 18: case 19: case 20:
				expandable_menu_id 	= 'sub_about';
				can_toggle 			= false;
				break;
			case 23: case 26: 
				expandable_menu_id  = 'sub_downloads';
				menu_id				= 'menu12';
				can_toggle 			= false;
				break;
			case 24: case 25: case 33:
				expandable_menu_id  = 'sub_downloads';
				menu_id				= 'menu10';
				can_toggle 			= false;
				break;	
			// activeX installation
			case 1009: case 2009: case 3009: case 27:
				expandable_menu_id  = 'sub_downloads';
				menu_id				= 'menu9';
				can_toggle 			= false;
				break;	
			case 101: case 102: case 103: case 104: case 105: case 106: case 107:
				expandable_menu_id  = 'sub_about';
				menu_id				= 'menu19';
				can_toggle 			= false;
				break;		
			// tour pages
			case 111: case 112: case 113: case 114: case 115:
			case 116: case 117: case 118: case 119: case 120: 
				is_submenu 			= false;
				menu_id				= 'menu0';
				can_toggle 			= false;
				break;
		}
		reset_preview();
		if(expandable_menu_id)
		{
			collapse_all();
			toggle_menu(expandable_menu_id);
		}
		move_bridge(get_object(menu_id),is_submenu,expandable_menu_id);
		load_content(page_id);
		can_toggle = true;
		
		if (page_id == 10) {
		  if (IE) page_id += '_ie';
		  if (!IE && !SAFARI) page_id += '_ff';
		}
		if (  page_id != 23     // desktop toolbar installed page
		  &&  page_id != 24     // IE plugin instructions 
		  &&  page_id != 33     // FF plugin thank you page
		  &&  page_id != 2009   // IE activex instructions
		  &&  page_id != 3009)  // IE activex installed page
  		SnapMaulerLogger.logPageviewEvent("/about/index.php?page_id="+page_id);
	}
	function is_url(url) {
		var regexp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
		return regexp.test(url);
	}
	function is_somewhat_url(url) {
		var regexp = /[a-zA-Z0-9]{1,}\.[a-zA-Z]{2,4}/
		return regexp.test(url);
	}

	function validate_url(url)
	{
		if(url == "") 
		{
			alert("Please Enter URL before submitting the form");
			return false;
		}
		if(!is_somewhat_url(url))
		{
			alert("The text you entered does not appear to be a valid URL. Please re-enter.");
			return false;
		}
		return true;
	}
	function popup_sizes()
	{
		var popup_sizes = window.open("http://i.snap.com/images/bsb_sizes.gif","popup_sizes","width=600,height=800,location=no,status=no,address=no,toolbar=no,top=0,left=0");
	}