/***********************************************
* 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
    
    /*code modified by Riccardo Galli (http://www.sideralis.org)*/
    var myDiv=document.getElementById(divId);
    myDiv.className=divClass;
    
    myDiv.style.position="relative";
    myDiv.style.overflow="hidden";
    myDiv.innerHTML=''+
        '<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>';
    
    /* end code mofication*/
    /*
    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);
    */
    this.initialize();
}

// -------------------------------------------------------------------
// 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;
}