var num=1

            img1 = new Image ()

            img1.src = "images/paint1.jpg"

            img2 = new Image ()

            img2.src = "images/paint2.jpg"

            img3 = new Image ()

            img3.src = "images/paint3.jpg"

            img4 = new Image ()

            img4.src = "images/paint4.jpg"

            img5 = new Image ()

            img5.src = "images/paint5.jpg" 

            img6 = new Image ()

            img6.src = "images/paint6.jpg"

            img7 = new Image ()

            img7.src = "images/paint7.jpg"

            img8 = new Image ()

            img8.src = "images/paint8.jpg"

            img9 = new Image ()

            img9.src = "images/paint9.jpg" 

            img10 = new Image ()

            img10.src = "images/paint10.jpg"

            img11 = new Image ()

            img11.src = "images/paint11.jpg" 

            img12 = new Image ()

            img12.src = "images/paint12.jpg"

            function slideshowplus()

            {

                num=num+1

                if (num==13)

                        {num=1}

                document.mypic.src=eval("img"+num+".src")

            } 

            function slideshowminus()

            {

                num=num-1

                if (num==0)

                        {num=12}

                document.mypic.src=eval("img"+num+".src")

            }