$curr=1;
$max=8;

function NextFoto(id){
if ($curr==$max){
$a=1;
$curr=1;
}
else{
$curr = $curr+1;
$a=$curr;
}
document.foto.src='/projects/projects'+id+'/photo/'+$a+'.jpg';
SetCaption($a);
}

function PrevFoto(id){
if ($curr==1){
$a=$max;
$curr=$max;
}
else{
$curr = $curr-1;
$a=$curr;
}
document.foto.src='/projects/projects'+id+'/photo/'+$a+'.jpg';
SetCaption($a);
}

function SetCaption(i){
var vdin_text=document.getElementById('din_text');

if (i == 1) vdin_text.innerHTML= "";
if (i == 2) vdin_text.innerHTML= "";
if (i == 3) vdin_text.innerHTML= "";
if (i == 4) vdin_text.innerHTML= "";
if (i == 5) vdin_text.innerHTML= "";
if (i == 6) vdin_text.innerHTML= "";
if (i == 7) vdin_text.innerHTML= "";
if (i == 8) vdin_text.innerHTML= "";
}

function ShowForm(){
document.write ('<form name=\"form1\"><input type=button name=prev value=\"<<< Предыдущий\" onclick=javascript:PrevFoto()>&nbsp;');
document.write ('<input type=button name=exit value=\"Выход в каталог\" onclick=\"location.href=\'../projects.html\'\">&nbsp;');
document.write ('<input type=button name=prev value=\"Следующий >>>\" onclick=javascript:NextFoto()></form>');
}