// PRELOADING IMAGES
if (document.images) {
    img = new Array();
    for (i=1; i<14; i=i+1) {
	img[i] = new Image(); 
	//img[i].src = "imgs/baltic-deco-planner-screenshot-"+i+".png"; 
    }
    img[1].src = "imgs/baltic-deco-planner-screenshot-oc-and-ccr.png"; 
    img[2].src = "imgs/baltic-deco-planner-screenshot-nitrox-and-trimix.png"; 
    img[3].src = "imgs/baltic-deco-planner-screenshot-zhl16b-gradient-factors-and-vpmb.png"; 
    img[4].src = "imgs/baltic-deco-planner-screenshot-altitude-adjustments.png"; 
    img[5].src = "imgs/baltic-deco-planner-screenshot-gas-consumption.png"; 
    img[6].src = "imgs/baltic-deco-planner-screenshot-cns-otus-icd.png"; 
    img[7].src = "imgs/baltic-deco-planner-screenshot-dive-configuration.png"; 
    img[8].src = "imgs/baltic-deco-planner-screenshot-repetitive-dives.png"; 
    img[9].src = "imgs/baltic-deco-planner-screenshot-bailout-profiles.png"; 
    img[10].src = "imgs/baltic-deco-planner-screenshot-lost-gas-profiles.png"; 
    img[11].src = "imgs/baltic-deco-planner-screenshot-partial-pressure-graph.png"; 
    img[12].src = "imgs/baltic-deco-planner-screenshot-saving-multiple-dive-plans.png"; 
    img[13].src = "imgs/baltic-deco-planner-screenshot-dive-plan-export.png"; 
    links = new Array();   
}

function roll(v) {
    document.screenshot.src = img[v].src;
}