var image1 = new Image();
var image2 = new Image();
var image3 = new Image();
var image4 = new Image();
var image5 = new Image();
var image6 = new Image();
var image7 = new Image();

var imgsrc1 = "img/sidebar/chevylogo1";
var imgsrc2 = "img/sidebar/chevylogo2";
var imgsrc3 = "img/sidebar/chevylogo3";
var imgsrc4 = "img/sidebar/chevylogo4";
var imgsrc5 = "img/sidebar/chevylogo5";
var imgsrc6 = "img/sidebar/chevylogo6";

var numimgs = 6;

image1.src = imgsrc1 + ".gif";
image2.src = imgsrc2 + ".gif";
image3.src = imgsrc3 + ".gif";
image4.src = imgsrc4 + ".gif";
image5.src = imgsrc5 + ".gif";
image6.src = imgsrc6 + ".gif";

var step = 1;

function slideit()
{
   if(!document.images) return;
   document.images.slide.src=eval("image" + step + ".src");
   if(step < numimgs)
      ++step;
   else
      step = 1;
   setTimeout("slideit()", 5000)
}

slideit();