// Messages item struc
function MessageItem( iMessageTypeID, sLinkURL, sGraphicURL, sGraphicAltText, iDisplayTime, sMessageText )
{
	this.MessageTypeID 	= iMessageTypeID;
	this.LinkURL 	    = sLinkURL;
	this.GraphicURL 	= sGraphicURL;
	this.GraphicAltText = sGraphicAltText;
	this.DisplayTime 	= iDisplayTime;
	this.MessageText 	= sMessageText;
}

// News item struc
function NewsItem( iNewsID, sTitle, sLocation )
{
	this.NewsID 	= iNewsID;
	this.Title 	    = sTitle;
	this.Location   = sLocation;
}

// Array to hold message data
var aMessageArray = new Array( new MessageItem( 3,' ',' ',' ',-1,' '));

// Array to hold news data
var aNewsArray = new Array( new NewsItem( 19732,'Deaf Awareness Conference','Forcewide'),
new NewsItem( 19731,'Can you help locate stolen bicycle?','Taunton'),
new NewsItem( 19727,'Roads now re-opened','Bristol'),
new NewsItem( 19727,'Portway and Suspension Bridge temporarily closed','Bristol'),
new NewsItem( 19726,'Police are appealing for information after woman is believed to have been conned','Yeovil'));

// Ticker functions
var iCurrentIndex = 0;
var bGoTicker = true;
var bStopTicker = false;
// References to page objects
var oAnchor;
var oTickerArea;

function GoTicker()
{
    if ( !bStopTicker  )
    { // If ticker isn't stopped

        // alert('GoTicker()');
        if ( !bGoTicker ) return false;

        // Reference objects in use
        if ( oAnchor == null )
        {
            // Load cookie message array
            if ( getCookie('CurrentTickerID') != null )
                iCurrentIndex = parseInt( getCookie('CurrentTickerID') );

            // Load cookie news array
            if ( getCookie('CurrentNewsID') != null )
                iCurrentNewsIndex = parseInt( getCookie('CurrentNewsID') );

            if ( document.getElementById )
            {
                oAnchor         = document.getElementById('PageTickerAnchor');
                oTickerArea     = document.getElementById('TickerArea');
            }
        }

        // Safe guard
        if ( iCurrentIndex > aMessageArray.length - 1 )
            iCurrentIndex = 0;

        // Determine message type
        switch( aMessageArray[ iCurrentIndex ].MessageTypeID )
        {
            case 1: // Text message
                oAnchor.innerHTML   = aMessageArray[iCurrentIndex].MessageText;
                oAnchor.href        = aMessageArray[iCurrentIndex].LinkURL;

                // Display message for X seconds
                setTimeout('NextMessage()', parseInt( aMessageArray[iCurrentIndex].DisplayTime ) * 1000 );
                break;
            case 2: // Graphic message
                oAnchor.innerHTML   = '<img border="0" src="' + aMessageArray[iCurrentIndex].GraphicURL + '" alt="' + aMessageArray[iCurrentIndex].GraphicAltText + '" /> ' + aMessageArray[iCurrentIndex].MessageText;
                oAnchor.href        = aMessageArray[iCurrentIndex].LinkURL;

                // Display message for X seconds
                setTimeout('NextMessage()', parseInt( aMessageArray[iCurrentIndex].DisplayTime ) * 1000 );
                break;
            case 3: // News
                // oAnchor.innerHTML   = '<h2>News.....</h2>';
                // setTimeout('NextMessage()', 5000 );
                GoNewsMessage();
                break;
        }

    } // END bStopTicker
}

// News ticker
var iCurrentNewsIndex = 0;
var iCurrentNewsChar = 0;

// Display news message
function GoNewsMessage()
{
    if ( !bStopTicker )
    { // If ticker isn't stopped

        // Safe guard
        if ( iCurrentNewsIndex > aNewsArray.length - 1 )
            iCurrentNewsIndex = 0;

	   // Display the next part of the news story
	   var sArrayStoryText = aNewsArray[ iCurrentNewsIndex ].Title + ' (' + aNewsArray[ iCurrentNewsIndex ].Location + ')';
	   var sHref           = '/newsroom/ViewStory.aspx?nsid=' + aNewsArray[ iCurrentNewsIndex ].NewsID;
	   oAnchor.href        = sHref;

	   if ( iCurrentNewsChar > sArrayStoryText.length ){
		  // Pause story - Ready next one
            iCurrentNewsChar = 0;

		  if ( iCurrentNewsIndex >= aNewsArray.length - 1 )
		  { // End of news messages
		      iCurrentNewsIndex = 0;
		      setTimeout("NextMessage()", 5000);
		  }
		  else
		  { // Move to next news message
			 iCurrentNewsIndex++;
			 setTimeout("GoNewsMessage()", 5000);
		  }

		  // Save current news story
		  setCookie('CurrentNewsID', iCurrentNewsIndex, '', '/', '', false );

	   } else {
		  // Display
		  var sStoryText = sArrayStoryText.substring( 0, iCurrentNewsChar );
		  iCurrentNewsChar++;

		  oAnchor.innerHTML = '<b>Latest news:</b> ' + sStoryText + '_'; // Display the text
		  // oTickerArea.innerHTML = '<a href="' + sHref + '" class="help_and_contents_links"><b>Latest news:</b> ' + sStoryText + '_</a>'; // Display the text

		  setTimeout("GoNewsMessage()", 75 );
	   }

    } // END bStopTicker
}

// Move to the next message in the ticker
function NextMessage()
{
    //  alert('NextMessage()' );

    if ( iCurrentIndex >= ( aMessageArray.length - 1 ) ){
		iCurrentIndex = 0;
	} else {
		iCurrentIndex++;
	}
	iCurrentChar = 0;

    // Save current message mode
    // setCookie('CurrentTickerID', iCurrentIndex);
    // setCookie('CurrentTickerID', iCurrentIndex, new Date().getTime(), '/', '', false );
    setCookie('CurrentTickerID', iCurrentIndex, '', '/', '', false );

	GoTicker();
}

// Stop the ticker
function StopTicker()
{
    bStopTicker = true;
}