// image 1
function changeStackOrder1()
{
document.getElementById("img1").style.zIndex="2";
document.getElementById('flash').style.display = 'none';
}

function changeStackOrder_back1()
{
document.getElementById("img1").style.zIndex="-1";
document.getElementById('flash').style.display = 'block';
}



// image 2
function changeStackOrder2()
{
document.getElementById("img2").style.zIndex="2";
document.getElementById('flash').style.display = 'none';
}

function changeStackOrder_back2()
{
document.getElementById("img2").style.zIndex="-2";
document.getElementById('flash').style.display = 'block';
}




// image 3
function changeStackOrder3()
{
document.getElementById("img3").style.zIndex="2";
document.getElementById('flash').style.display = 'none';
}

function changeStackOrder_back3()
{
document.getElementById("img3").style.zIndex="-3";
document.getElementById('flash').style.display = 'block';
}



// image 4
function changeStackOrder4()
{
document.getElementById("img4").style.zIndex="2";
document.getElementById('flash').style.display = 'none';
}

function changeStackOrder_back4()
{
document.getElementById("img4").style.zIndex="-1";
document.getElementById('flash').style.display = 'block';
}



// image 5
function changeStackOrder5()
{
document.getElementById("img5").style.zIndex="2";
document.getElementById('flash').style.display = 'none';
}

function changeStackOrder_back5()
{
document.getElementById("img5").style.zIndex="-1";
document.getElementById('flash').style.display = 'block';
}