{
var folder, tag, tag1, tag2, tag3, tag4, tag5, image01, image02, image03, image04, image05, whichpicture;
folder = "images/";
tag1 = "01.jpg";
tag2 = "02.jpg";
tag3 = "03.jpg";
tag4 = "04.jpg";
tag5 = "05.jpg";
whichpicture = Math.floor(Math.random()*(5))
}
function switcher () {
image01 = folder+tag+tag1;
image02 = folder+tag+tag2;
image03 = folder+tag+tag3;
image04 = folder+tag+tag4;
image05 = folder+tag+tag5;
thumb1.src=image01;
thumb2.src=image02;
thumb3.src=image03;
thumb4.src=image04;
thumb5.src=image05;
img1.src=image01;
}
function randomiser (){
if (whichpicture==0){change1();}
else if (whichpicture==1){change2();}
else if (whichpicture==2){change3();}
else if (whichpicture==3){change4();}
else if (whichpicture==4){change5();}
}

function change1 (){
img1.src=image01;
thumb1.className='preview3';thumb2.className='preview2';thumb3.className='preview2';thumb4.className='preview2';thumb5.className='preview2'; 
banner1.className='over'; banner2.className=''; banner3.className=''; banner4.className=''; banner5.className=''
}
function change2 (){
img1.src=image02;
thumb1.className='preview2';thumb2.className='preview3';thumb3.className='preview2';thumb4.className='preview2';thumb5.className='preview2'; 
banner1.className=''; banner2.className='over'; banner3.className=''; banner4.className=''; banner5.className=''
}
function change3 (){
img1.src=image03;
thumb1.className='preview2';thumb2.className='preview2';thumb3.className='preview3';thumb4.className='preview2';thumb5.className='preview2'; 
banner1.className=''; banner2.className=''; banner3.className='over'; banner4.className=''; banner5.className=''
}
function change4 (){
img1.src=image04;
thumb1.className='preview2';thumb2.className='preview2';thumb3.className='preview2';thumb4.className='preview3';thumb5.className='preview2'; 
banner1.className=''; banner2.className=''; banner3.className=''; banner4.className='over'; banner5.className=''
}
function change5 (){
img1.src=image05;
thumb1.className='preview2';thumb2.className='preview2';thumb3.className='preview2';thumb4.className='preview2';thumb5.className='preview3'; 
banner1.className=''; banner2.className=''; banner3.className=''; banner4.className=''; banner5.className='over'
}