/*
 *bottom id="up1"
 *onmouseup="dw_scrollObj.resetSpeed('wn1')"
 *onmousedown="dw_scrollObj.doubleSpeed('wn1')"
 *onmouseout="dw_scrollObj.stopScroll('wn1')"
 *onmouseover="dw_scrollObj.initScroll('wn1','up')"
 *
 *top id="down1"
 *onmouseup="dw_scrollObj.resetSpeed('wn1')"
 *onmousedown="dw_scrollObj.doubleSpeed('wn1')"
 *onmouseout="dw_scrollObj.stopScroll('wn1')"
 *onmouseover="dw_scrollObj.initScroll('wn1','down')"
 */

/** This is high-level function.
 * It must react to delta being more/less than zero.
 */
function handle(delta) {
    if (delta < 0) {
        dw_scrollObj.resetSpeed('wn1');
        dw_scrollObj.initScrollOnMouse('wn1','down', 3000);
    } else {
        dw_scrollObj.resetSpeed('wn1');
        dw_scrollObj.initScrollOnMouse('wn1','up', 3000);
    }
}

/** Event handler for mouse wheel event.
 */
function wheel(event){
        var delta = 0;
        if (!event) /* For IE. */
                event = window.event;
        if (event.wheelDelta) { /* IE/Opera. */
                delta = event.wheelDelta/120;
                /** In Opera 9, delta differs in sign as compared to IE.
                 */
                if (window.opera)
                        delta = -delta;
        } else if (event.detail) { /** Mozilla case. */
                /** In Mozilla, sign of delta is different than in IE.
                 * Also, delta is multiple of 3.
                 */
                delta = -event.detail/3;
        }
        /** If delta is nonzero, handle it.
         * Basically, delta is now positive if wheel was scrolled up,
         * and negative, if wheel was scrolled down.
         */
        if (delta)
                handle(delta);
        /** Prevent default actions caused by mouse wheel.
         * That might be ugly, but we handle scrolls somehow
         * anyway, so don't bother here..
         */
        if (event.preventDefault)
                event.preventDefault();
	event.returnValue = false;
}

/** Initialization code.
 * If you use your own event management code, change it as required.
 */
if (window.addEventListener)
        /** DOMMouseScroll is for mozilla. */
        window.addEventListener('DOMMouseScroll', wheel, false);
/** IE/Opera. */
window.onmousewheel = document.onmousewheel = wheel;

document.onkeydown = startScrollOnKey;
document.onkeyup = stopScrollOnKey;

function startScrollOnKey(e) {
   var KeyID = (window.event) ? event.keyCode : e.keyCode;

   switch(KeyID) {
      case 38:
        dw_scrollObj.resetSpeed('wn1');
        dw_scrollObj.initScrollOnMouse('wn1','up', 2000);
      break;
      case 40:
        dw_scrollObj.resetSpeed('wn1');
        dw_scrollObj.initScrollOnMouse('wn1','down', 2000);
      break;
   }
}

function stopScrollOnKey(e) {
   var KeyID = (window.event) ? event.keyCode : e.keyCode;
   switch(KeyID) {
      case 38:
      case 40:
        dw_scrollObj.stopScroll('wn1');
      break;
   }
}