/***********************************************
* CMotion Image Gallery II- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* Visit http://www.dynamicDrive.com for source code
* Modified by jscheuer1 for vertical orientation, at http://www.dynamicDrive.com/forums
***********************************************/

var restarea=6 //1) width of the "neutral" area in the center of the gallery in px
var maxspeed=7 //2) top scroll speed in pixels. Script auto creates a range from 0 to top speed.

var iedom = document.all||document.getElementById
var scrollspeed=0
var movestate=""

var actualheight=''
var cross_scroll
var loadedyes=0

function ietruebody()
{
    return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function getposOffset(what, offsettype)
{
    var totaloffset=(offsettype=="left")? what.offsetLeft: what.offsetTop;
    var parentEl=what.offsetParent;
    while (parentEl!=null)
    {
        totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
        parentEl=parentEl.offsetParent;
    }
    return totaloffset;
}


function moveup()
{
    if (loadedyes)
    {
        movestate="up"
        if (iedom && parseInt(cross_scroll.style.top) > (menu_height-actualheight))
        {
            cross_scroll.style.top = parseInt(cross_scroll.style.top) - scrollspeed+"px"
        }
    }
    uptime=setTimeout("moveup()",10)
}

function movedown()
{
    if (loadedyes)
    {
        movestate="down"
        if (iedom && parseInt(cross_scroll.style.top) < 0 )
        {
            cross_scroll.style.top=parseInt(cross_scroll.style.top)+scrollspeed+"px"
        }
    }
    downtime=setTimeout("movedown()",10)
}

function motionengine(e)
{
    var dsocx=(window.pageXOffset)? pageXOffset: ietruebody().scrollLeft;
    var dsocy=(window.pageYOffset)? pageYOffset : ietruebody().scrollTop;
    var curposy=window.event? event.clientY : e.clientY? e.clientY: ""
    curposy-=mainobjoffset-dsocy
    var leftbound=(menu_height-restarea)/2
    var rightbound=(menu_height+restarea)/2
    if (curposy>rightbound)
    {
        scrollspeed=(curposy-rightbound)/((menu_height-restarea)/2) * maxspeed
        if (window.downtime) clearTimeout(downtime)
        if (movestate!="up") moveup()
    }
    else if (curposy<leftbound)
    {
        scrollspeed=(leftbound-curposy)/((menu_height-restarea)/2) * maxspeed
        if (window.uptime) clearTimeout(uptime)
        if (movestate!="down") movedown()
    }
    else
        scrollspeed=0
}

function contains_ns6(a, b) 
{
    while (b.parentNode)
        if ((b = b.parentNode) == a)
            return true;
    return false;
}

function stopmotion(e)
{
    if ((window.event&&!crossmain.contains(event.toElement)) || (e && e.currentTarget && e.currentTarget!= e.relatedTarget && !contains_ns6(e.currentTarget, e.relatedTarget)))
    {
        if (window.downtime) clearTimeout(downtime)
            if (window.uptime) clearTimeout(uptime)
                movestate=""
    }
}

function fillup()
{
    if (iedom)
    {
        img0 = document.getElementById? document.getElementById("image-tower-img-0") : document.all.image-tower-img-0
        img1 = document.getElementById? document.getElementById("image-tower-img-1") : document.all.image-tower-img-1
        img2 = document.getElementById? document.getElementById("image-tower-img-2") : document.all.image-tower-img-2
        
        if(!img0.complete || !img1.complete || !img2.complete)
        {
            setTimeout(fillup, 50);
            return;
        }
    
        crossmain = document.getElementById? document.getElementById("motioncontainer") : document.all.motioncontainer
        cross_scroll=document.getElementById? document.getElementById("motiongallery") : document.all.motiongallery
                
        prev = document.getElementById? document.getElementById("image-tower-prev") : document.all.image-tower-prev
        next = document.getElementById? document.getElementById("image-tower-next") : document.all.image-tower-next

        if(typeof(crossmain) == 'undefined' || typeof(cross_scroll) == 'undefined' || typeof(prev) == 'undefined' || typeof(next) == 'undefined'
            || crossmain == null || cross_scroll == null || prev == null || next == null)
        {
            return;
        }

        //opredeljaem visotu pervih 3 foto + border'i
        height = img0.height + img1.height + img2.height + 65;
        if(height < 400) height = 400;
        
        crossmain.style.cssText = "width:210px; height:"+height+"px; overflow:hidden; position: relative; text-align: center;";
        
        menu_height=parseInt(crossmain.style.height)
        mainobjoffset=getposOffset(crossmain, "top")
        actualheight=cross_scroll.offsetHeight

//        crossmain.onmousemove = function(e){
//            motionengine(e)
//        }

//        crossmain.onmouseout=function(e){
//            stopmotion(e)
//            showhidediv("hidden")
//        }

        prev.onmousemove = next.onmousemove = function(e){
            motionengine(e)
        }

        prev.onmouseout = next.onmouseout=function(e){
            stopmotion(e)
        }
    }
    if (window.opera)
    {
        cross_scroll.style.top=menu_height-actualheight+'px'
        setTimeout('cross_scroll.style.top=0', 10)
    }
    
    loadedyes=1    
}