var backgroundSrcs = new Array("images/bg_Marsh.jpg", "images/bg_OpenRoadSunsetField.jpg", "images/bg_RoadDesertMtns.jpg", "images/bg_RoadMeadow.jpg", "images/bg_RoadOrchardField.jpg", "images/bg_Marsh.jpg") 

function pickimage() 
{ 
var bgimage=backgroundSrcs[(Math.floor(Math.random()*(backgroundSrcs.length-1)))]
document.getElementById("backgroundContainer").style.backgroundImage = "url('" + bgimage + "')";

}

function setBackgroundSub(setMe)
{

    var subbgimage = backgroundSrcs[setMe];
    document.getElementById("whipper").style.backgroundImage = "url('" + subbgimage + "')"; 
    
}