var imageArray = new Array();

imageArray[0] = "images/banner1.jpg";
imageArray[1] = "images/banner2.jpg";
imageArray[2] = "images/banner3.jpg";
imageArray[3] = "images/banner4.jpg";
imageArray[4] = "images/banner5.jpg";
imageArray[5] = "images/banner6.jpg";
imageArray[6] = "images/banner7.jpg";
imageArray[7] = "images/banner8.jpg";
imageArray[8] = "images/banner9.jpg";
imageArray[9] = "images/banner10.jpg";
function doIt()
{
var rand = Math.floor(Math.random()*10);

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

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

}
doIt();