/***********************************************
* Pausing up-down scroller- © Dynamic Drive (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit http://www.dynamicdrive.com/ for this script and 100s more.
***********************************************/

function pausescroller(content, divId, divClass, delay) {
    this.content = content //message array content
    this.tickerid = divId //ID of ticker div to display information
    this.delay = delay //Delay between msg change, in miliseconds.
    this.mouseoverBol = 0 //Boolean to indicate whether mouse is currently over scroller (and pause it if it is)
    this.hiddendivpointer = 1 //index of message array for hidden div
    document.write('<div id="' + divId + '" class="' + divClass + '" style="position: relative; overflow: hidden"><div class="innerDiv" style="position: absolute; width: 100%" id="' + divId + '1">' + content[0] + '</div><div class="innerDiv" style="position: absolute; width: 100%; visibility: hidden" id="' + divId + '2">' + content[1] + '</div></div>')
    var scrollerinstance = this
    if (window.addEventListener) //run onload in DOM2 browsers
        window.addEventListener("load", function() { scrollerinstance.initialize() }, false)
    else if (window.attachEvent) //run onload in IE5.5+
        window.attachEvent("onload", function() { scrollerinstance.initialize() })
    else if (document.getElementById) //if legacy DOM browsers, just start scroller after 0.5 sec
        setTimeout(function() { scrollerinstance.initialize() }, 500)
}

// -------------------------------------------------------------------
// initialize()- Initialize scroller method.
// -Get div objects, set initial positions, start up down animation
// -------------------------------------------------------------------

pausescroller.prototype.initialize = function() {
    this.tickerdiv = document.getElementById(this.tickerid)
    this.visiblediv = document.getElementById(this.tickerid + "1")
    this.hiddendiv = document.getElementById(this.tickerid + "2")
    this.visibledivtop = parseInt(pausescroller.getCSSpadding(this.tickerdiv))
    //set width of inner DIVs to outer DIV's width minus padding (padding assumed to be top padding x 2)
    this.visiblediv.style.width = this.hiddendiv.style.width = this.tickerdiv.offsetWidth - (this.visibledivtop * 2) + "px"
    this.getinline(this.visiblediv, this.hiddendiv)
    this.hiddendiv.style.visibility = "visible"
    var scrollerinstance = this
    document.getElementById(this.tickerid).onmouseover = function() { scrollerinstance.mouseoverBol = 1 }
    document.getElementById(this.tickerid).onmouseout = function() { scrollerinstance.mouseoverBol = 0 }
    if (window.attachEvent) //Clean up loose references in IE
        window.attachEvent("onunload", function() { scrollerinstance.tickerdiv.onmouseover = scrollerinstance.tickerdiv.onmouseout = null })
    setTimeout(function() { scrollerinstance.animateup() }, this.delay)
}


// -------------------------------------------------------------------
// animateup()- Move the two inner divs of the scroller up and in sync
// -------------------------------------------------------------------

pausescroller.prototype.animateup = function() {
    var scrollerinstance = this
    if (parseInt(this.hiddendiv.style.top) > (this.visibledivtop + 5)) {
        this.visiblediv.style.top = parseInt(this.visiblediv.style.top) - 5 + "px"
        this.hiddendiv.style.top = parseInt(this.hiddendiv.style.top) - 5 + "px"
        setTimeout(function() { scrollerinstance.animateup() }, 50)
    }
    else {
        this.getinline(this.hiddendiv, this.visiblediv)
        this.swapdivs()
        setTimeout(function() { scrollerinstance.setmessage() }, this.delay)
    }
}

// -------------------------------------------------------------------
// swapdivs()- Swap between which is the visible and which is the hidden div
// -------------------------------------------------------------------

pausescroller.prototype.swapdivs = function() {
    var tempcontainer = this.visiblediv
    this.visiblediv = this.hiddendiv
    this.hiddendiv = tempcontainer
}

pausescroller.prototype.getinline = function(div1, div2) {
    div1.style.top = this.visibledivtop + "px"
    div2.style.top = Math.max(div1.parentNode.offsetHeight, div1.offsetHeight) + "px"
}

// -------------------------------------------------------------------
// setmessage()- Populate the hidden div with the next message before it's visible
// -------------------------------------------------------------------

pausescroller.prototype.setmessage = function() {
    var scrollerinstance = this
    if (this.mouseoverBol == 1) //if mouse is currently over scoller, do nothing (pause it)
        setTimeout(function() { scrollerinstance.setmessage() }, 100)
    else {
        var i = this.hiddendivpointer
        var ceiling = this.content.length
        this.hiddendivpointer = (i + 1 > ceiling - 1) ? 0 : i + 1
        this.hiddendiv.innerHTML = this.content[this.hiddendivpointer]
        this.animateup()
    }
}
pausescroller.getCSSpadding = function(tickerobj) { //get CSS padding value, if any
    if (tickerobj.currentStyle)
        return tickerobj.currentStyle["paddingTop"]
    else if (window.getComputedStyle) //if DOM2
        return window.getComputedStyle(tickerobj, "").getPropertyValue("padding-top")
    else
        return 0
}