/***********************************************************************************************

Copyright (c) 2005 - Alf Magne Kalleland post@dhtmlgoodies.com

Get this and other scripts at www.dhtmlgoodies.com

You can use this script freely as long as this copyright message is kept intact.

***********************************************************************************************/
var menuAlignment = 'left';	// Align menu to the left or right?		
var topMenuSpacer = 10; // Horizontal space(pixels) between the main menu items	
var activateSubOnClick = false; // if true-> Show sub menu items on click, if false, show submenu items onmouseover
var leftAlignSubItems = false; 	// left align sub items t

var activeMenuItem = false;	// Don't change this option. It should initially be false
var activeTabIndex = 0;	// Index of initial active tab	(0 = first tab) - If the value below is set to true, it will override this one.
var rememberActiveTabByCookie = false;	// Set it to true if you want to be able to save active tab as cookie

var MSIE = navigator.userAgent.indexOf('MSIE')>=0?true:false;
var Opera = navigator.userAgent.indexOf('Opera')>=0?true:false;
var navigatorVersion = navigator.appVersion.replace(/.*?MSIE ([0-9]\.[0-9]).*/g,'$1')/1;

/*
These cookie functions are downloaded from 
http://www.mach5.com/support/analyzer/manual/html/General/CookiesJavaScript.htm
*/
/*
function Get_Cookie(name) { 
    var start = document.cookie.indexOf(name+"="); 
    var len = start+name.length+1; 
    if ((!start) && (name != document.cookie.substring(0,name.length))) return null; 
    if (start == -1) return null; 
    var end = document.cookie.indexOf(";",len); 
    if (end == -1) end = document.cookie.length; 
    return unescape(document.cookie.substring(len,end)); 
} 
// This function has been slightly modified
function Set_Cookie(name,value,expires,path,domain,secure) { 
    expires = expires * 60*60*24*1000;
    var today = new Date();
    var expires_date = new Date( today.getTime() + (expires) );
    var cookieString = name + "=" +escape(value) + 
    ( (expires) ? ";expires=" + expires_date.toGMTString() : "") + 
    ( (path) ? ";path=" + path : "") + 
    ( (domain) ? ";domain=" + domain : "") + 
    ( (secure) ? ";secure" : ""); 
    document.cookie = cookieString; 
}	
*/
function showHide()
{
    if(activeMenuItem){
        activeMenuItem.className = 'inactiveMenuItem'; 	
        var theId = activeMenuItem.id.replace(/[^0-9]/g,'');
        document.getElementById('submenu_'+theId).style.display='none';
        var img = activeMenuItem.getElementsByTagName('IMG');
        if(img.length>0)img[0].style.display='none';			
    }
    
    var img = this.getElementsByTagName('IMG');
    if(img.length>0)img[0].style.display='inline';
    
    activeMenuItem = this;		
    this.className = 'activeMenuItem';
    var theId = this.id.replace(/[^0-9]/g,'');
    document.getElementById('submenu_'+theId).style.display='block';
    
    
    
   /* if(rememberActiveTabByCookie){
        Set_Cookie('dhtmlgoodies_tab_menu_tabIndex','index: ' + (theId-1),100);
    }*/
}

function initMenu()
{
    var mainMenuObj = document.getElementById('mainMenu');
    var menuItems = mainMenuObj.getElementsByTagName('A');
    if(document.all){
        mainMenuObj.style.visibility = 'hidden';
        document.getElementById('submenu').style.visibility='hidden';
    }	
    
    /*if(rememberActiveTabByCookie){
        var cookieValue = Get_Cookie('dhtmlgoodies_tab_menu_tabIndex') + '';
        cookieValue = cookieValue.replace(/[^0-9]/g,'');
        if(cookieValue.length>0 && cookieValue<menuItems.length){
            activeTabIndex = cookieValue/1;
        }			
    }*/
    
    activeTabIndex = getActiveTab();
    
    var currentLeftPos = 15;
    for(var no=0;no<menuItems.length;no++){			
        if(activateSubOnClick)menuItems[no].onclick = showHide; else menuItems[no].onmouseover = showHide;
        menuItems[no].id = 'mainMenuItem' + (no+1);
        if(menuAlignment=='left')
            menuItems[no].style.left = currentLeftPos + 'px';
        else
            menuItems[no].style.right = currentLeftPos + 'px';
        currentLeftPos = currentLeftPos + menuItems[no].offsetWidth + topMenuSpacer; 
        
        var img = menuItems[no].getElementsByTagName('IMG');
        if(img.length>0){
            img[0].style.display='none';
            if(MSIE && !Opera && navigatorVersion<7){
                img[0].style.bottom = '-1px';
                img[0].style.right = '-1px';
            }
        }
        
        if(no==activeTabIndex){
            menuItems[no].className='activeMenuItem';
            activeMenuItem = menuItems[no];
            var img = activeMenuItem.getElementsByTagName('IMG');
            if(img.length>0)img[0].style.display='inline';	
            
        }else menuItems[no].className='inactiveMenuItem';
        if(!document.all)menuItems[no].style.bottom = '-1px';
        if(MSIE && navigatorVersion < 6)menuItems[no].style.bottom = '-2px';
        
        
    }		
    
    var mainMenuLinks = mainMenuObj.getElementsByTagName('A');
    
    var subCounter = 1;
    var parentWidth = mainMenuObj.offsetWidth;
    while(document.getElementById('submenu_' + subCounter)){
        var subItem = document.getElementById('submenu_' + subCounter);
        
        if(leftAlignSubItems){
            // No action
        }else{							
            var leftPos = mainMenuLinks[subCounter-1].offsetLeft;
            document.getElementById('submenu_'+subCounter).style.paddingLeft =  leftPos + 'px';
            subItem.style.position ='absolute';
            if(subItem.offsetWidth > parentWidth){
                leftPos = leftPos - Math.max(0,subItem.offsetWidth-parentWidth); 	
            }
            subItem.style.paddingLeft =  leftPos + 'px';
            subItem.style.position ='static';
        }
        if(subCounter==(activeTabIndex+1)){
            subItem.style.display='block';
        }else{
            subItem.style.display='none';
        }

        subCounter++;
    }
    if(document.all){
        mainMenuObj.style.visibility = 'visible';
        document.getElementById('submenu').style.visibility='visible';
    }		
    document.getElementById('submenu').style.display='block';
}

function loadAll(){
    initMenu();
    if (typeof load_google != 'undefined') {
        load_google();
    }
    if(typeof LoadMapsSearch != 'undefined'){
        LoadMapsSearch();
    }
}

function getActiveTab() {
    var search_string = window.location.search.substring(1);
    if(search_string){
        var search = search_string.split("&");
        
        var page= "";
        for (i=0;i<search.length;i++) {
            var key_value = search[i].split("=");
            if(key_value[0] == "page"){
                page = key_value[1].toLowerCase();
                break;
            }
       }
       
       if(page == "events" ){
           return 1;
       }else if(page == "stations" || 
           page == "channels" || 
           page == "all_cha" || 
           page == "quality" || 
           page == "sta" ||
           page == "glos" ||
           page == "mag"){
           return 2;
       }else if(page == "cont" || page == "cre" || page == "dis"){
           return 3;
       }else{
           return 0;
       }
    }else{
           return 0;
    }
}

window.onload = loadAll;