// set speed of banner (pause in milliseconds between characters)
var speed = 100 // decrease value to increase speed (must be positive)

// set pause between completion of message and beginning of following message
var pause = 1000 // increase value to increase pause

// set initial values
var timerID = null
var bannerRunning = false

// create global array
var ar = new Array()

// assign the strings to the array's elements
ar[0] = "Hitech Diagnostic Center, an ISO 9001:2000 Certified Clinical Laboratory and a NABL accredited Laboratory Welcomes you"
//ar[1] = "Our branches at Kilpauk, Alwarpet, Saligramam and Anna Nagar"
ar[1] = "Developed & maintained by Sukraa Software Solution Pvt. Ltd., Chennai"

// set index of first message to be displayed first
var currentMessage = 0

// set index of last character to be displayed first
var offset = 0

// stop the banner if it is currently running
function stopBanner() 
{
    // if banner is currently running
    if (bannerRunning)
        // stop the banner
        clearTimeout(timerID)

    // timer is now stopped
    bannerRunning = false
}

// start the banner
function startBanner() 
{
    // make sure the banner is stopped
    stopBanner()

    // start the banner from the current position
    showBanner()
}

// type-in the current message
function showBanner() 
{
    // assign current message to variable
    var text = ar[currentMessage]

    // if current message has not finished being displayed
    if (offset < text.length) 
    {
        // if last character of current message is a space
        if (text.charAt(offset) == " ")
            // skip the current character
            offset++

        // assign the up-to-date to-be-displayed substring
        // second argument of method accepts index of last character plus one
        var partialMessage = text.substring(0, offset + 1) 

        // display partial message in status bar
        window.status = partialMessage

        // increment index of last character to be displayed
        offset++ // IE sometimes has trouble with "++offset"

        // recursive call after specified time
        timerID = setTimeout("showBanner()", speed)

        // banner is running
        bannerRunning = true
    } 
    else 
    {
        // reset offset
        offset = 0

        // increment subscript (index) of current message
        currentMessage++

        // if subscript of current message is out of range
        if (currentMessage == ar.length)
            // wrap around (start from beginning)
            currentMessage = 0

        // recursive call after specified time
        timerID = setTimeout("showBanner()", pause)

        // banner is running
        bannerRunning = true
    }
}