var fetch_action;
var fetch_section;


function init_menu()
{
    fetch_section = "menu";
    fetch_action  = "home";
    fetchData("get_site_menu.php","0" ,"menu" );
    
}

function menu_click(item)
{
   fetch_section = "menu";
   fetch_action='';
   if (item==1)
   {
      fetch_action='home';
   }
   if (item==2)
   {
      fetch_action='benefit';
   }
   if (item==3)
   {
      fetch_action='whatisit';
   }
      
   if (item==4)
   {
      fetch_action='howitworks';
   }
            
   if (item==5)
   {
      fetch_action='contactus';
   }

   if (item==6)
   {
      fetch_action='alert_maps';
   }
   
   fetchData("get_site_menu.php",item,"menu");
   return false;;

}

// action variable is used to drive where to
//   store result from url request
//
function fetchData(url , dataToSend )
{
   var pageRequest = false;
   
   if (window.XMLHttpRequest) 
   {
      pageRequest = new XMLHttpRequest() ;
   }
   else
   { 
      if(window.ActiveXObject)
      {
         pageRequest = new ActiveXObject("Microsoft.XMLHTTP");
      }
      else
      {
         alert("no xml ajax function?");
         return false;
      }
   }

   pageRequest.onreadystatechange =
      function(  )
      {
             if (pageRequest.readyState == 4)
		{
		  if( fetch_section=="menu" )
		  {
                     loadMenu(     pageRequest.responseText , fetch_action );
                  }
                  else
                  {
                     loadContent(  pageRequest.responseText , fetch_action );
                  }
                }
      }

   if(dataToSend)
   {
     var sendData = "menu_choice=" + dataToSend;
     pageRequest.open('POST',url,true);
     pageRequest.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
     pageRequest.send(sendData);
   }
   else
   {
     pageRequest.open('GET',url,true);
     pageRequest.send(null);
   }
   
   return false;
 }


// load menu and perform 'action'
//
function loadMenu(message, action ) 
{
    // display proper menu
    //
    objMenu = document.getElementById( "menu" );
    objMenu.innerHTML = message ;
    
    // use action to get content
    //
    if (action=='home')
    {
        fetch_section = "content";
        fetch_action  = 0;
        fetchData("get_site_menu.php","40","content" );
        
        return;
    }    
    if (action=='benefit')
    {
        fetch_section = "content";
        fetch_action  = 0;
        fetchData("get_site_menu.php","41","content" );
        
        return;
    }
    
    if (action=='whatisit')
    {
        fetch_section = "content";
        fetch_action  = 0;
        fetchData("get_site_menu.php","42","content" );
        
        return;
    }
    
    if (action=='howitworks')
    {
        fetch_section = "content";
        fetch_action  = 0;
        fetchData("get_site_menu.php","43","content" );
        
        return;
    }
    
    if (action=='contactus')
    {
        fetch_section = "content";
        fetch_action  = 0;
        fetchData("get_site_menu.php","44","content" );
        
        return;
    }
    
    if (action=='alert_maps')
    {
        fetch_section = "content";
        fetch_action  = 0;
        fetchData("get_site_menu.php","45","content" );
        
        return;
    }

}


// load menu and perform 'action'
//
function loadContent(message, action ) 
{
    objMenu = document.getElementById( "content" );
    objMenu.innerHTML = message ;
}