function page1()
{
document.getElementById("image_one").style.visibility="visible";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}

 
 
 function page2()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="visible";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}


 function page3()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="visible";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}

 function page4()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="visible";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}

 function page5()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="visible";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}

 function page6()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="visible";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}

function page7()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="visible";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}


function page8()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="visible";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}

function page9()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="visible";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}

function page10()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="visible";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}

function page11()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="visible";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}

function page12()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="visible";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}


function page13()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="visible";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}


function page14()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="visible";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}



function page15()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="visible";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}


function page16()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="visible";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="hidden";
}


function page17()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="visible";
document.getElementById("image_18").style.visibility="hidden";
}


function page18()
{
document.getElementById("image_one").style.visibility="hidden";
document.getElementById("image_two").style.visibility="hidden";
document.getElementById("image_three").style.visibility="hidden";
document.getElementById("image_four").style.visibility="hidden";
document.getElementById("image_five").style.visibility="hidden";
document.getElementById("image_six").style.visibility="hidden";
document.getElementById("image_seven").style.visibility="hidden";
document.getElementById("image_eight").style.visibility="hidden";
document.getElementById("image_nine").style.visibility="hidden";
document.getElementById("image_ten").style.visibility="hidden";
document.getElementById("image_11").style.visibility="hidden";
document.getElementById("image_12").style.visibility="hidden";
document.getElementById("image_13").style.visibility="hidden";
document.getElementById("image_14").style.visibility="hidden";
document.getElementById("image_15").style.visibility="hidden";
document.getElementById("image_16").style.visibility="hidden";
document.getElementById("image_17").style.visibility="hidden";
document.getElementById("image_18").style.visibility="visible";
}