/*************************************************************
* WALCAM WEB_WORKS - Adapted scroller
* Tested on IE, FireFox, Opera, Chrome
************
* Version 3 - added new function SHUFFLE
* Version 2 - added scroll speed parameter
define WALCAM_SCROLL_VERSION = 3;
************
* From Original code supplied by:
* 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, speed){
	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.speed=speed;         //speed of scroll : 1=slow, 5=fast
	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" title="Scroll is Halted"><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.visiblediv.style.align=this.hiddendiv.style.align=this.tickerdiv.style.align;
	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+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()}, 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
}

// -------------------------------------------------------------------
// SHUFFLE - function to shuffle the scrollable items
// -------------------------------------------------------------------
shuffle = function(v){
    for(var j, x, i = v.length; i; j = parseInt(Math.random() * i), x = v[--i], v[i] = v[j], v[j] = x);
    return v;
}