var standardImg=new Image();standardImg.src="images/NextStandard.jpg"
var hoverImg=new Image();hoverImg.src="images/NextHover.jpg"
var depressImg=new Image();depressImg.src="images/NextDepress.jpg"

function changeImage(img,type)
{
//alert(img);
  switch(type){
    case "depress":document.images[img].src=depressImg.src;break;
    case "hover":document.images[img].src=hoverImg.src;break;
    case "standard":document.images[img].src=standardImg.src;break;
  }}