// Need at least two occurances (bug)
var pausecontent=new Array()
pausecontent[0]='<h4>AINA Star Party: Moon occults Venus</h4><p>April 22, 2009 5am to 6am<br>'
pausecontent[1]='<h4>AINA Star Party: Moon, Mercury, Saturn</h4><p>April 26, 2009 6pm to 8:30pm<br>Palos Verdes'

//pausecontent[0]='</a>'
//pausecontent[1]='</a>'

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
}