function draggable(el){
        el.css(‘cursor‘, ‘move‘);
        var eventX, eventY, startX, startY, drag;
        el.on(‘mousedown‘, function(event){
            eventX = event.clientX;
            eventY = event.clientY;
            startX = parseInt(el.css(‘left‘));
            startY = parseInt(el.css(‘top‘));
            drag = true;
            if(this.setCapture){this.setCapture();}
        }).on(‘mouseup‘, function(event){
            drag = false;
            if(this.releaseCapture){this.releaseCapture();}
        });
        $(document).on(‘mousemove‘, function(event){
            if(drag){
                var l = startX + (event.clientX - eventX);
                var t = startY + (event.clientY - eventY);
                el.css({left : l, top : t,});
            }
        }).on(‘mouseup‘, function(){
            drag = false;
        });
    }