var num=1
            img1 = new Image ()
            img1.src = "images/slide1.jpg"
            img2 = new Image ()
            img2.src = "images/slide2.jpg"
            img3 = new Image ()
            img3.src = "images/slide3.jpg"  
            img4 = new Image ()
            img4.src = "images/slide4.jpg"  
            img5 = new Image ()
            img5.src = "images/slide5.jpg"  
            img6 = new Image ()
            img6.src = "images/slide6.jpg"  
            img7 = new Image ()
            img7.src = "images/slide7.jpg"   
            img8 = new Image ()
            img8.src = "images/slide8.jpg"
            img9 = new Image ()
            img9.src = "images/slide9.jpg"
            img10 = new Image ()
            img10.src = "images/slide10.jpg"
            img11 = new Image ()
            img11.src = "images/slide11.jpg"   
            img12 = new Image ()
            img12.src = "images/slide12.jpg"    
            img13 = new Image ()
            img13.src = "images/slide13.jpg"     
            img14 = new Image ()
            img14.src = "images/slide14.jpg"    
            img15 = new Image ()
            img15.src = "images/slide15.jpg"   
            img16 = new Image ()
            img16.src = "images/slide16.jpg"   
            img17 = new Image ()
            img17.src = "images/slide17.jpg"
            function slideshow()
            {
                num=num+1
                if (num==18)
                        {num=1}
                document.mypic.src=eval("img"+num+".src")
            }