Merge remote branch splitbrain/master and added back drag.js (for compatibility reason)

lib/scripts/drag.js

+/**
+* Makes a DOM object draggable
+*
+* If you just want to move objects around, use drag.attach. For full
+* customization, drag can be used as a javascript prototype, it is
+* inheritance-aware.
+*
+* @link http://nofunc.org/Drag_Drop/
+*/
+var drag = {
+    obj: null,
+    handle: null,
+    oX: 0, // object X position
+    oY: 0, // object Y position
+    eX: 0, // event X delta
+    eY: 0, // event Y delta
+
+    /**
+* Attaches the needed handlers to the given object
+*
+* This can be called for multiple objects, the right one is later
+* determined from the event itself. The handle is optional
+*
+* @param DOMObject obj The object that should be draggable
+* @param DOMObject handle A handle on which the obj can be dragged
+*/
+    attach: function (obj,handle) {
+        if(handle){
+            handle.dragobject = obj;
+        }else{
+            handle = obj;
+        }
+        var _this = this;
+        addEvent($(handle),'mousedown',function (e) {return _this.start(e); });
+    },
+
+    /**
+* Starts the dragging operation
+*/
+    start: function (e){
+        this.handle = e.target;
+        if(this.handle.dragobject){
+            this.obj = this.handle.dragobject;
+        }else{
+            this.obj = this.handle;
+        }
+
+        this.handle.className += ' ondrag';
+        this.obj.className += ' ondrag';
+
+        this.oX = parseInt(this.obj.style.left);
+        this.oY = parseInt(this.obj.style.top);
+        this.eX = e.pageX;
+        this.eY = e.pageY;
+
+        var _this = this;
+        this.mousehandlers = [function (e) {return _this.drag(e);}, function (e) {return _this.stop(e);}];
+        addEvent(document,'mousemove', this.mousehandlers[0]);
+        addEvent(document,'mouseup', this.mousehandlers[1]);
+
+        return false;
+    },
+
+    /**
+* Ends the dragging operation
+*/
+    stop: function(){
+        this.handle.className = this.handle.className.replace(/ ?ondrag/,'');
+        this.obj.className = this.obj.className.replace(/ ?ondrag/,'');
+        removeEvent(document,'mousemove', this.mousehandlers[0]);
+        removeEvent(document,'mouseup', this.mousehandlers[1]);
+        this.obj = null;
+        this.handle = null;
+    },
+
+    /**
+* Moves the object during the dragging operation
+*/
+    drag: function(e) {
+        if(this.obj) {
+            this.obj.style.top = (e.pageY+this.oY-this.eY+'px');
+            this.obj.style.left = (e.pageX+this.oX-this.eX+'px');
+        }
+    }
+};
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