/***********************************************
* 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, speed, delay) {
	this.content=content	//message array content
	this.tickerid=divId	//ID of ticker div to display information
	this.speed=speed	//Speed for the scrolling, in pixels
	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+'" style="position: relative; overflow: hidden"><div style="width: 100%; max-height:110px; overflow:hidden" id="'+divId+'1">'+content[0]+'</div><div style="width: 100%; max-height:110px; overflow:hidden; visibility: hidden" id="'+divId+'2">'+content[1]+'</div></div>')
	if (content[1]) {
		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.visiblediv.style.position = "absolute";
	this.hiddendiv.style.position = "absolute";
	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 IE5.5+
		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 + this.speed)) {
		this.visiblediv.style.top=parseInt(this.visiblediv.style.top) - this.speed + "px";
		this.hiddendiv.style.top=parseInt(this.hiddendiv.style.top) - this.speed + "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()}, 200)
	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
}