//The array which is going to hold the image information. Store the image info along with their correct path; I've omitted the path here as I've stored the images in the same folder where my web page resides.
var imageArray = new Array();

imageArray[0] = "images/slideshow/quote/slideshow_1.gif"; 
imageArray[1] = "images/slideshow/quote/slideshow_2.gif";
imageArray[2] = "images/slideshow/quote/slideshow_3.gif";
imageArray[3] = "images/slideshow/quote/slideshow_4.gif";
imageArray[4] = "images/slideshow/quote/slideshow_5.gif"; 
imageArray[5] = "images/slideshow/quote/slideshow_6.gif";
imageArray[6] = "images/slideshow/quote/slideshow_7.gif";
imageArray[7] = "images/slideshow/quote/slideshow_8.gif";
imageArray[8] = "images/slideshow/quote/slideshow_9.gif"; 
imageArray[9] = "images/slideshow/quote/slideshow_10.gif";
imageArray[10] = "images/slideshow/quote/slideshow_11.gif";
imageArray[11] = "images/slideshow/quote/slideshow_12.gif";
imageArray[12] = "images/slideshow/quote/slideshow_13.gif"; 
imageArray[13] = "images/slideshow/quote/slideshow_14.gif";
imageArray[14] = "images/slideshow/quote/slideshow_15.gif";
imageArray[15] = "images/slideshow/quote/slideshow_16.gif";
imageArray[16] = "images/slideshow/quote/slideshow_17.gif"; 
imageArray[17] = "images/slideshow/quote/slideshow_18.gif";
imageArray[18] = "images/slideshow/quote/slideshow_19.gif";
function doIt()
{
var rand = Math.floor(Math.random()*19); //Generating a random number between 0 and 3 here in your case you can replace 4 with 11 if you have 10 images

var imgPath = "<img src='"+imageArray[rand]+"' alt='quote' border='0' align='middle'/>";

document.getElementById("image").innerHTML = imgPath;

}