/*
* 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 */
    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 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);
}


/*
 * 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);
    }
}

/*
 * 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";
}

/*
 * 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;
    }
}