var ie=document.all||document.getElementById;
var ns4=document.layers;
var deadzone=100;
var maxspeed=4;
var hspeed=0; 
var vspeed=1; 
var lflag=0;
var sLayer, cLayer, vLayer, mOffset, mainWidth, ns_scroll, contentheight, lefttime, righttime;
var direction='';
var actualwidth='';

function shlayer(lname){
    for (i=1;i<=6;i++){
        ln='content'+i;
        if (ie) ((document.getElementById) ? document.getElementById(ln) : document.all[ln]).style.visibility='hidden';
        else if (ns4) document.nscontainer.document.ln.style.visibility='hide';
    }
    if (ie) ((document.getElementById) ? document.getElementById(lname) : document.all[lname]).style.visibility='visible';
    else if (ns4) document.nscontainer.document.lname.style.visibility='show';
    if (lname=='content3') { 
        if (ie){
            contentheight= ((document.getElementById) ? document.getElementById('content3') : document.all['content3']).offsetHeight;
            ((document.getElementById) ? document.getElementById('content6') : document.all['content6']).style.visibility='visible';
        }
        else if (ns4){ 
            contentheight= document.nscontainer.document.content3.clip.height;
            document.nscontainer.document.content6.style.visibility='show';
        }
    }
}

function moveup(){
    if (ie) {
        layer3=(document.getElementById) ? document.getElementById('content3') : document.all['content3'];
        if (((document.getElementById) ? document.getElementById('content3') : document.all['content3']).style.visibility=='visible') {
            if (parseInt(layer3.style.top)<=0) layer3.style.top=parseInt(layer3.style.top)+vspeed+'px';
        }
    }
    else if (ns4) {
        if (document.nscontainer.document.content3.style.visibility=='show') {
            if (layer3.top<=0) layer3.top+=vspeed;
        }
    }
    moveupvar=setTimeout("moveup()",20);
}

function movedown(){
    if (ie) {
        layer3=(document.getElementById) ? document.getElementById('content3') : document.all['content3'];
        if (((document.getElementById) ? document.getElementById('content3') : document.all['content3']).style.visibility=='visible') {
            if (parseInt(layer3.style.top)>=(contentheight*(-1)+100)) layer3.style.top=parseInt(layer3.style.top)-vspeed+'px';
        }
    }
    else if (ns4) {
        if (document.nscontainer.document.content3.style.visibility=='show') {
            if (layer3.top<=0) layer3.top-=vspeed;
        }
    }
    movedownvar=setTimeout("movedown()",20);
}

function getOffset(obj, direct){
    var tOffset=(direct=='left') ? obj.offsetLeft : obj.offsetTop;
    var par=obj.offsetParent;
    while (par!=null){
        tOffset=(direct=='left') ? tOffset+par.offsetLeft : tOffset+par.offsetTop;
        par=par.offsetParent;
    }
    return tOffset;
}

function moveleft(){
    if (lflag){
        direction='left';
        if (ie&&parseInt(sLayer.style.left)>(mainWidth-actualwidth)) sLayer.style.left=parseInt(sLayer.style.left)-hspeed+'px';
    }
    lefttime=setTimeout('moveleft()',10);
}

function moveright(){
    if (lflag){
        direction='right';
        if (ie&&parseInt(sLayer.style.left)<0) sLayer.style.left=parseInt(sLayer.style.left)+hspeed+'px';
    }
    righttime=setTimeout('moveright()',10);
}

function mover(e){
    var ox=(window.pageXOffset) ? pageXOffset: gbody().scrollLeft;
    var oy=(window.pageYOffset) ? pageYOffset : gbody().scrollTop;
    var currentPosY=(window.event) ? event.clientX : (e.clientX ? e.clientX : '');
    currentPosY-=mOffset-ox;
    var aleftZone=(mainWidth-deadzone)/2;
    var arightZone=(mainWidth+deadzone)/2;
    if (currentPosY>arightZone){
        hspeed=(currentPosY-arightZone)/((mainWidth-deadzone)/2) * maxspeed;
        if (window.righttime) clearTimeout(righttime);
        if (direction!='left') moveleft();
    }
    else if (currentPosY<aleftZone){
        hspeed=(aleftZone-currentPosY)/((mainWidth-deadzone)/2) * maxspeed;
        if (window.lefttime) clearTimeout(lefttime);
        if (direction!='right') moveright()
    }
    else hspeed=0;
}

function stop(e){
    if ((window.event && !cLayer.contains(event.toElement)) || (e && e.currentTarget && e.currentTarget != e.relatedTarget && !contains_ns6(e.currentTarget, e.relatedTarget))){
        if (window.lefttime) clearTimeout(lefttime);
        if (window.righttime) clearTimeout(righttime);
        direction='';
    }
}

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

function fillup(){
    if (ie){
        cLayer=(document.getElementById) ? document.getElementById('container') : document.all.container;
        mainWidth=parseInt(cLayer.style.width);
        mOffset=getOffset(cLayer, 'left');
        sLayer=(document.getElementById) ? document.getElementById('content1') : document.all.content1;
        document.getElementById('top').innerHTML = sLayer.innerHTML;
        actualwidth=(document.all) ? sLayer.offsetWidth : document.getElementById('top').offsetWidth;
        if (!window.opera) document.getElementById('top').style.display='none';
        cLayer.onmousemove=function(e){
            mover(e);
        }
        cLayer.onmouseout=function(e){
            stop(e);
        }
    }
    lflag=1
}

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

window.onload=fillup;