// ==============================================================
// 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.png" width="23" height="14"></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/down.png" width="23" height="14"></a></div><div class="thumb" id="'+thumb+'" style="left: 135px; top: 15px;"><img src="images/thumb.png" width="21" height="21"></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);
                }
        }
})