/***********************************************
* 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
}