/***********************************************
* 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)
{
	var scrollerinstance=this
	
	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[ ( content.length > 1 ) ? 1 : 0 ] + 
					'</div></div>' )
	
	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 + 1
		var ceiling = this.content.length
		
		this.hiddendivpointer    = ( i >= ceiling ) ? 0 : i
		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
}