<!--
    imag = new Array()
    imag[0] = "images/a.gif"
    imag[1] = "images/b.gif"
    imag[2] = "images/c.gif"
    imag[3] = "images/d.gif"
    //-->
<!--
function swtch(num,imgname){
     imgname.src = im[num].src
}
im = new Array()
for (var i = 0; i < imag.length; i++){
         im[i] = new Image()
         im[i].src = imag[i]
}
//-->