/*
EXAMPLE OF CONTENT / USE :

CONTENT FEED :

var pausecontent = new Array()
pausecontent[0]='<a href="http://www.javascriptkit.com">JavaScript Kit</a><br />Comprehensive JavaScript tutorials and over 400+ free scripts!'
pausecontent[1]='<a href="http://www.codingforums.com">Coding Forums</a><br />Web coding and development forums.'
pausecontent[2]='<a href="http://www.cssdrive.com" target="_new">CSS Drive</a><br />Categorized CSS gallery and examples.'

USE :

<script type="text/javascript">
//new pausescroller(name_of_message_array, CSS_ID, CSS_classname, pause_in_miliseconds)
new pausescroller(pausecontent, "pscroller1", "someclass", 3000)
</script>

*/
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.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
    this.speed=speed;
    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)
}

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)
}

pausescroller.prototype.animateup = function() {
    var scrollerinstance=this
    if (parseInt(this.hiddendiv.style.top)>(this.visibledivtop+1)) {
        this.visiblediv.style.top=parseInt(this.visiblediv.style.top)-1+"px"
        this.hiddendiv.style.top=parseInt(this.hiddendiv.style.top)-1+"px"
        setTimeout(function(){scrollerinstance.animateup()}, 15*this.speed)
    } else {
        this.getinline(this.hiddendiv, this.visiblediv)
        this.swapdivs()
        setTimeout(function(){scrollerinstance.setmessage()}, this.delay)
    }
}

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"
}

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
}