//variable that will increment through the images
var step=1
function slideit(){
    //if browser does not support the image object, exit.
    if (!document.images)
        return

        document["histosjr"].src=eval("image"+step+".src")
        if (step<3)
            step++
            else
                step=1
                //call function "slideit()" every 2.5 seconds
                setTimeout("slideit()",2500)
}