var image_html = "";
var image_src = "";
var image_alt = "";
var count = 4;
var date = new Date();
var seconds = date.getSeconds();
var choice = seconds % count;
if (choice == 0)
{
image_src = "davedesk.jpg";
image_alt = "Dave at his desk";
}
if (choice == 1)
{
image_src = "davetux.jpg";
image_alt = "Dave in a Tux";
}
else if (choice == 2)
{
image_src = "davecigar.jpg";
image_alt = "Dave smoking a cigar";
}
else if (choice == 3)
{
image_src = "davesmile.jpg";
image_alt = "Dave with a grin";
}
if (image_src != "")
image_html = '<IMG ALT="' + image_alt + '" SRC="images/' + image_src + '">';