// ==============================================================
// HANDLES SCROLLER/S
// Modified from Aaron Boodman http://webapp.youngpup.net/?request=/components/ypSimpleScroll.xml
// mixed ypSimpleScroll with dom-drag script and allowed multiple scrolelrs through array instances
// (c)2004 Sergi Meseguer (http://zigotica.com/), 04/2004:
// ==============================================================
var theHandle = []; var theRoot = []; var theThumb = []; var theScroll = []; var thumbTravel = []; var ratio = [];

function instantiateScroller(count, id, left, top, width, height, speed) {
    if (document.getElementById) {
        theScroll[count] = new ypSimpleScroll(id, left, top, width, height, speed);
    }
}

function createDragger(count, handler, root, thumb, minX, maxX, minY, maxY)
 {
    var buttons = '<div class="up" id="up' + count + '"><a href="#" onmouseover="theScroll[' + count + '].scrollNorth(\'' + count + '\')" onmouseout="theScroll[' + count + '].endScroll()" onclick="return false;"><img src="images/up.gif" width="15" height="15"></a></div><div class="dn"  id="dn' + count + '""><a href="#" onmouseover="theScroll[' + count + '].scrollSouth(\'' + count + '\')" onmouseout="theScroll[' + count + '].endScroll()" onclick="return false;"><img src="images/dn.gif" width="15" height="15"></a></div><div class="thumb" id="' + thumb + '" style="left: 135px; top: 15px;"><img src="images/thumb.gif" width="15" height="15"></div>';
    document.getElementById(root).innerHTML = buttons + document.getElementById(root).innerHTML;

    theRoot[count] = document.getElementById(root);
    theThumb[count] = document.getElementById(thumb);
    var thisup = document.getElementById("up" + count);
    var thisdn = document.getElementById("dn" + count);
    theThumb[count].style.left = parseInt(minX + 15) + "px";
    thisup.style.left = parseInt(minX + 15) + "px";
    thisdn.style.left = parseInt(minX + 15) + "px";
    theThumb[count].style.border = 0;
    theThumb[count].style.top = parseInt(minY) + "px";
    thisup.style.top = 0 + "px";
    thisdn.style.top = parseInt(minY + maxY) + "px";
    //thisdn.style.top = 15 + "px";

    theScroll[count].load();

    //Drag.init(theHandle[count], theRoot[count]); //not draggable on screen
    Drag.init(theThumb[count], null, minX + 15, maxX + 15, minY, maxY);

    // the number of pixels the thumb can travel vertically (max - min)
    thumbTravel[count] = theThumb[count].maxY - theThumb[count].minY;

    // the ratio between scroller movement and thumbMovement
    ratio[count] = theScroll[count].scrollH / thumbTravel[count];

    theThumb[count].onDrag = function(x, y) {
        theScroll[count].jumpTo(null, Math.round((y - theThumb[count].minY) * ratio[count]));
    }
}

// INITIALIZER:
// ==============================================================
// ala Simon Willison http://simon.incutio.com/archive/2004/05/26/addLoadEvent
function addLoadEvent(fn) {
    var old = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = fn;
    }
    else {
        window.onload = function() {
            old();
            fn();
        }
    }
}
addLoadEvent(function() {
    if (theScroll.length > 0) {
        for (var i = 0; i < theScroll.length; i++) {
            createDragger(i, "handle" + i, "root" + i, "thumb" + i, theScroll[i].clipW, theScroll[i].clipW, 15, theScroll[i].clipH - 30);
        }
    }
})