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