/*------------------------------quirksmode-------------------------------------------------------*/
dragDrop = {
    keyHTML: '<a href="#" class="keyLink">#</a>',
    keySpeed: 10, // pixels per keypress event
    initialMouseX: undefined,
    initialMouseY: undefined,
    startX: undefined,
    startY: undefined,
    dXKeys: undefined,
    dYKeys: undefined,
    draggedObject: undefined,
    initElement: function (element) {
        element.onmousedown = dragDrop.startDragMouse;
/*        element.innerHTML += dragDrop.keyHTML;
        var links = element.getElementsByTagName('a');
        var lastLink = links[links.length-1];
        lastLink.relatedElement = element;
        lastLink.onclick = dragDrop.startDragKeys;*/
    },
    startDragMouse: function (e) {
        dragDrop.startDrag($('lightwindow_container'));
        var evt = e || window.event;
        dragDrop.initialMouseX = evt.clientX;
        dragDrop.initialMouseY = evt.clientY;
        addEventSimple(document,'mousemove',dragDrop.dragMouse);
        addEventSimple(document,'mouseup',dragDrop.releaseElement);
        return false;
    },
    startDragKeys: function () {
        dragDrop.startDrag(this.relatedElement);
        dragDrop.dXKeys = dragDrop.dYKeys = 0;
        addEventSimple(document,'keydown',dragDrop.dragKeys);
        addEventSimple(document,'keypress',dragDrop.switchKeyEvents);
        this.blur();
        return false;
    },
    startDrag: function (obj) {
        if (dragDrop.draggedObject)
            dragDrop.releaseElement();
        dragDrop.startX = obj.offsetLeft;
        dragDrop.startY = obj.offsetTop;
        dragDrop.draggedObject = obj;
        obj.className += ' dragged';
    },
    dragMouse: function (e) {
        var evt = e || window.event;
        var dX = evt.clientX - dragDrop.initialMouseX;
        var dY = evt.clientY - dragDrop.initialMouseY;
        dragDrop.setPosition(dX,dY);
        return false;
    },
    dragKeys: function(e) {
        var evt = e || window.event;
        var key = evt.keyCode;
        switch (key) {
            case 37:    // left
            case 63234:
                dragDrop.dXKeys -= dragDrop.keySpeed;
                break;
            case 38:    // up
            case 63232:
                dragDrop.dYKeys -= dragDrop.keySpeed;
                break;
            case 39:    // right
            case 63235:
                dragDrop.dXKeys += dragDrop.keySpeed;
                break;
            case 40:    // down
            case 63233:
                dragDrop.dYKeys += dragDrop.keySpeed;
                break;
            case 13:     // enter
            case 27:     // escape
                dragDrop.releaseElement();
                return false;
            default:
                return true;
        }
        dragDrop.setPosition(dragDrop.dXKeys,dragDrop.dYKeys);
        if (evt.preventDefault) // also solves problem in Saf; keypress part of default ???
            evt.preventDefault();
        return false;
    },
    setPosition: function (dx,dy) {
        dragDrop.draggedObject.style.left = dragDrop.startX + dx + 'px';
        dragDrop.draggedObject.style.top = dragDrop.startY + dy + 'px';
    },
    switchKeyEvents: function () {

        // for Opera and Safari 1.3

        removeEventSimple(document,'keydown',dragDrop.dragKeys);
        removeEventSimple(document,'keypress',dragDrop.switchKeyEvents);
        addEventSimple(document,'keypress',dragDrop.dragKeys);
    },
    releaseElement: function() {
        removeEventSimple(document,'mousemove',dragDrop.dragMouse);
        removeEventSimple(document,'mouseup',dragDrop.releaseElement);
        removeEventSimple(document,'keypress',dragDrop.dragKeys);
        removeEventSimple(document,'keypress',dragDrop.switchKeyEvents);
        removeEventSimple(document,'keydown',dragDrop.dragKeys);
        dragDrop.draggedObject.className = dragDrop.draggedObject.className.replace(/dragged/,'');
        dragDrop.draggedObject = null;
    }
}

function addEventSimple(obj,evt,fn) {
    if (obj.addEventListener)
        obj.addEventListener(evt,fn,false);
    else if (obj.attachEvent)
        obj.attachEvent('on'+evt,fn);
}

function removeEventSimple(obj,evt,fn) {
    if (obj.removeEventListener)
        obj.removeEventListener(evt,fn,false);
    else if (obj.detachEvent)
        obj.detachEvent('on'+evt,fn);
}